FYVE domain found in zinc finger FYVE domain-containing protein 21 (ZF21) and similar proteins; ZF21 is phosphoinositide-binding protein that functions as a regulator of focal adhesions and cell movement through interaction with focal adhesion kinase. It can also bind to the cytoplasmic tail of membrane type 1 matrix metalloproteinase, a potent invasion-promoting protease, and play a key role in regulating multiple aspects of cancer cell migration and invasion. ZF21 contains a FYVE domain, which corresponds to this model.

                        10        20        30        40        50        60
                ....*....|....*....|....*....|....*....|....*....|....*....|....
gi 18044523  16 EPQWVPDKECPRCMQCDAKFDFITRKHHCRRCGKCFCDRCCSQKVPLRRMCFVDPVRQCADCAL 79
Cdd:cd15727   1 EPPWVPDKECPVCMSCKKKFDFFKRRHHCRRCGKCFCSDCCSNKVPLPRMCFVDPVRVCNECAL 64

FYVE domain found in zinc finger FYVE domain-containing protein 21 (ZF21) and similar proteins; ZF21 is phosphoinositide-binding protein that functions as a regulator of focal adhesions and cell movement through interaction with focal adhesion kinase. It can also bind to the cytoplasmic tail of membrane type 1 matrix metalloproteinase, a potent invasion-promoting protease, and play a key role in regulating multiple aspects of cancer cell migration and invasion. ZF21 contains a FYVE domain, which corresponds to this model.

                        10        20        30        40        50        60
                ....*....|....*....|....*....|....*....|....*....|....*....|....
gi 18044523  16 EPQWVPDKECPRCMQCDAKFDFITRKHHCRRCGKCFCDRCCSQKVPLRRMCFVDPVRQCADCAL 79
Cdd:cd15727   1 EPPWVPDKECPVCMSCKKKFDFFKRRHHCRRCGKCFCSDCCSNKVPLPRMCFVDPVRVCNECAL 64

FYVE zinc finger; The FYVE zinc finger is named after four proteins that it has been found in: Fab1, YOTB/ZK632.12, Vac1, and EEA1. The FYVE finger has been shown to bind two Zn++ ions. The FYVE finger has eight potential zinc coordinating cysteine positions. Many members of this family also include two histidines in a motif R+HHC+XCG, where + represents a charged residue and X any residue. We have included members which do not conserve these histidine residues but are clearly related.

                          10        20        30        40        50        60
                  ....*....|....*....|....*....|....*....|....*....|....*....|...
gi 18044523    17 PQWVPDKECPRCMQCDAKFDFITRKHHCRRCGKCFCDRCCSQKVPLRRMCFVD-PVRQCADCA 78
Cdd:pfam01363   1 PVWVPDSSATVCMICSKPFTFFRRRHHCRNCGRVFCSACSSKKISLLPELGSNkPVRVCDACY 63

FYVE domain found in zinc finger FYVE domain-containing protein 21 (ZF21) and similar proteins; ZF21 is phosphoinositide-binding protein that functions as a regulator of focal adhesions and cell movement through interaction with focal adhesion kinase. It can also bind to the cytoplasmic tail of membrane type 1 matrix metalloproteinase, a potent invasion-promoting protease, and play a key role in regulating multiple aspects of cancer cell migration and invasion. ZF21 contains a FYVE domain, which corresponds to this model.

                        10        20        30        40        50        60
                ....*....|....*....|....*....|....*....|....*....|....*....|....
gi 18044523  16 EPQWVPDKECPRCMQCDAKFDFITRKHHCRRCGKCFCDRCCSQKVPLRRMCFVDPVRQCADCAL 79
Cdd:cd15727   1 EPPWVPDKECPVCMSCKKKFDFFKRRHHCRRCGKCFCSDCCSNKVPLPRMCFVDPVRVCNECAL 64

FYVE domain found in lateral signaling target protein 2 homolog (Lst2) and similar proteins; Lst2, also termed zinc finger FYVE domain-containing protein 28, is a monoubiquitinylated phosphoprotein that functions as a negative regulator of epidermal growth factor receptor (EGFR) signaling. Unlike other FYVE domain-containing proteins, Lst2 displays primarily non-endosomal localization. Its endosomal localization is regulated by monoubiquitinylation. Lst2 physically binds Trim3, also known as BERP or RNF22, which is a coordinator of endosomal trafficking and interacts with Hrs and a complex that biases cargo recycling.

                        10        20        30        40        50        60
                ....*....|....*....|....*....|....*....|....*....|....*....|.
gi 18044523  17 PQWVPDKECPRCMQCDAKFDFITRKHHCRRCGKCFCDRCCSQKVPLRRMCFVDPVRQCADC 77
Cdd:cd15731   3 PLWVPDEACPQCMACSAPFTVLRRRHHCRNCGKIFCSRCSSNSVPLPRYGQMKPVRVCNHC 63

FYVE zinc finger; The FYVE zinc finger is named after four proteins that it has been found in: Fab1, YOTB/ZK632.12, Vac1, and EEA1. The FYVE finger has been shown to bind two Zn++ ions. The FYVE finger has eight potential zinc coordinating cysteine positions. Many members of this family also include two histidines in a motif R+HHC+XCG, where + represents a charged residue and X any residue. We have included members which do not conserve these histidine residues but are clearly related.

                          10        20        30        40        50        60
                  ....*....|....*....|....*....|....*....|....*....|....*....|...
gi 18044523    17 PQWVPDKECPRCMQCDAKFDFITRKHHCRRCGKCFCDRCCSQKVPLRRMCFVD-PVRQCADCA 78
Cdd:pfam01363   1 PVWVPDSSATVCMICSKPFTFFRRRHHCRNCGRVFCSACSSKKISLLPELGSNkPVRVCDACY 63

FYVE domain found in myotubularin-related protein 3 (MTMR3) and similar proteins; MTMR3, also termed Myotubularin-related phosphatase 3, or FYVE domain-containing dual specificity protein phosphatase 1 (FYVE-DSP1), or zinc finger FYVE domain-containing protein 10, is a ubiquitously expressed phosphoinositide 3-phosphatase specific for phosphatidylinositol 3-phosphate (PtdIns3P or PI3P) and phosphatidylinositol 3,5-bisphosphate (PtdIns(3,5)P2) and PIKfyve, which produces PtdIns(3,5)P2 from PtdIns3P. It regulates cell migration through modulating phosphatidylinositol 5-phosphate (PtdIns5P) levels. MTMR3 contains an N-terminal PH-GRAM (PH-G) domain, a MTM phosphatase domain, a coiled-coil region, and a C-terminal FYVE domain. Unlike conventional FYVE domains, the FYVE domain of MTMR3 neither confers endosomal localization nor binds to PtdIns3P. It is also not required for the enzyme activity of MTMR3. In contrast, the PH-G domain binds phosphoinositides.

                        10        20        30        40        50
                ....*....|....*....|....*....|....*....|....*....|....*....
gi 18044523  19 WVPDKECPRCMQCDAKFDFITRKHHCRRCGKCFCDRCCSQKVPLRRMCFVDPVRQCADC 77
Cdd:cd15732   2 WVPDHLAASCYGCEREFWLASRKHHCRNCGNVFCGSCCNQKLPVPSQQLFEPSRVCKSC 60

FYVE domain found in metazoan PIKfyve, fungal and plant Fab1, and similar proteins; PIKfyve, also termed FYVE finger-containing phosphoinositide kinase, or 1-phosphatidylinositol 3-phosphate 5-kinase, or phosphatidylinositol 3-phosphate 5-kinase (PIP5K3), or phosphatidylinositol 3-phosphate 5-kinase type III (PIPkin-III or type III PIP kinase), is a phosphoinositide 5-kinase that forms a complex with its regulators, the scaffolding protein Vac14 and the lipid phosphatase Fig4. The complex is responsible for synthesizing phosphatidylinositol 3,5-bisphosphate [PtdIns(3,5)P2] from phosphatidylinositol 3-phosphate (PtdIns3P or PI3P). Then phosphatidylinositol-5-phosphate (PtdIns5P) is generated directly from PtdIns(3,5)P2. PtdIns(3,5)P2 and PtdIns5P regulate endosomal trafficking and responses to extracellular stimuli. At this point, PIKfyve is vital in early embryonic development. Moreover, PIKfyve forms a complex with ArPIKfyve (associated regulator of PIKfyve) and SAC3 at the endomembranes, which plays a role in receptor tyrosine kinase (RTK) degradation. The phosphorylation of PIKfyve by AKT can facilitate Epidermal growth factor receptor (EGFR) degradation. In addition, PIKfyve may participate in the regulation of the glutamate transporters EAAT2, EAAT3 and EAAT4, and the cystic fibrosis transmembrane conductance regulator (CFTR). It is also essential for systemic glucose homeostasis and insulin-regulated glucose uptake/GLUT4 translocation in skeletal muscle. It can be activated by protein kinase B (PKB/Akt) and further up-regulates human ether-a-go-go (hERG) channels. This family also includes the yeast and plant orthologs of human PIKfyve, Fab1. PIKfyve and its orthologs share a similar architecture. They contain an N-terminal FYVE domain, a middle region related to the CCT/TCP-1/Cpn60 chaperonins that are involved in productive folding of actin and tubulin, a second middle domain that contains a number of conserved cysteine residues (CCR) unique to this family, and a C-terminal lipid kinase domain related to PtdInsP kinases.

                        10        20        30        40        50        60
                ....*....|....*....|....*....|....*....|....*....|....*....|
gi 18044523  19 WVPDKECPRCMQCDAKFDFITRKHHCRRCGKCFCDRCCSQKVPLRRMCFVDPVRQCADCA 78
Cdd:cd15725   2 WMPDSSCKECYECSEKFTTFRRRHHCRLCGQIFCSRCCNQEIPGKFIGYPGDLRVCTYCC 61

FYVE domain found in Schizosaccharomyces pombe vacuolar protein sorting-associated protein 27 (spVps27p) and similar proteins; spVps27p, also termed suppressor of ste12 deletion protein 4 (Sst4p), is a conserved homolog of budding Saccharomyces cerevisiae Vps27 and of mammalian Hrs. It functions as a downstream factor for phosphatidylinositol 3-kinase (PtdIns 3-kinase) in forespore membrane formation with normal morphology. It colocalizes and interacts with Hse1p, a homolog of Saccharomyces cerevisiae Hse1p and of mammalian STAM, to form a complex whose ubiquitin-interacting motifs (UIMs) are important for sporulation. spVps27p contains a VHS (Vps27p/Hrs/Stam) domain, a FYVE domain, and two UIMs.

                        10        20        30        40        50        60
                ....*....|....*....|....*....|....*....|....*....|....*....|.
gi 18044523  17 PQWVpDKECprCMQCDAKFDFITRKHHCRRCGKCFCDRCCSQKVPLRRMCFVDPVRQCADC 77
Cdd:cd15735   1 PEWV-DSDV--CMRCRTAFTFTNRKHHCRNCGGVFCQQCSSKSLPLPHFGINQPVRVCDGC 58

FYVE domain found in protein containing both PH and FYVE domains 1 (phafin-1), 2 (phafin-2), and similar proteins; This family includes protein containing both PH and FYVE domains 1 (phafin-1) and 2 (phafin-2). Phafin-1 is a representative of a novel family of PH and FYVE domain-containing proteins called phafins. It is a ubiquitously expressed pro-apoptotic protein via translocating to lysosomes, facilitating apoptosis induction through a lysosomal-mitochondrial apoptotic pathway. Phafin-2 is a ubiquitously expressed endoplasmic reticulum-associated protein that facilitates tumor necrosis factor alpha (TNF-alpha)-triggered cellular apoptosis through endoplasmic reticulum (ER)-mitochondrial apoptotic pathway. It is an endosomal phosphatidylinositol 3-phosphate (PtdIns3P or PI3P) effector, as well as an interactor of the endosomal-tethering protein EEA1. It regulates endosome fusion upstream of Rab5. Phafin-2 also functions as a novel regulator of endocytic epidermal growth factor receptor (EGFR) degradation through a role in endosomal fusion.

                        10        20        30        40        50        60
                ....*....|....*....|....*....|....*....|....*....|....*....|
gi 18044523  19 WVPDKECPRCMQC-DAKFDFITRKHHCRRCGKCFCDRCCSQKVPLRRMCfVDPVRQCADC 77
Cdd:cd15717   2 WVPDSEAPVCMHCkKTKFTAINRRHHCRKCGAVVCGACSSKKFLLPHQS-SKPLRVCDTC 60

FYVE domain found in early endosome antigen 1 (EEA1) and similar proteins; EEA1, also termed endosome-associated protein p162, or zinc finger FYVE domain-containing protein 2, is an essential component of the endosomal fusion machinery and required for the fusion and maturation of early endosomes in endocytosis. It forms a parallel coiled-coil homodimer in cells. EEA1 serves as the p97 ATPase substrate and the p97 ATPase may regulate the size of early endosomes by governing the oligomeric state of EEA1. It can interact with the GTP-bound form of Rab22a and be involved in endosomal membrane trafficking. EEA1 also functions as an obligate scaffold for angiotensin II-induced Akt activation in early endosomes. It can be phosphorylated by p38 mitogen-activated protein kinase (MAPK) and further regulate mu opioid receptor endocytosis. EEA1 consists of an N-terminal C2H2 Zn2+ finger, four long heptad repeats, and a C-terminal region containing a calmodulin binding (IQ) motif, a Rab5 interaction site, and a FYVE domain. This model corresponds to the FYVE domain that is responsible for binding phosphatidyl inositol-3-phosphate (PtdIns3P or PI3P) on the membrane.

                        10        20        30        40        50        60
                ....*....|....*....|....*....|....*....|....*....|....*....|.
gi 18044523  17 PQWVPDKECPRCMQCDAKFDFITRKHHCRRCGKCFCDRCCSQKVPLRRMcfVDPVRQCADC 77
Cdd:cd15730   1 RKWADDEEVQNCMACGKGFSVTVRKHHCRQCGNIFCNECSSKTATTPSS--KKPVRVCDAC 59

FYVE domain found in RUN and FYVE domain-containing protein 1 (RUFY1) and similar proteins; RUFY1, also termed FYVE-finger protein EIP1, or La-binding protein 1, or Rab4-interacting protein (Rabip4), or Zinc finger FYVE domain-containing protein 12 (ZFY12), a human homologue of mouse Rabip4, an effector of Rab4 GTPase that regulates recycling of endocytosed cargo. RUFY1 is an endosomal protein that functions as a dual effector of Rab4 and Rab14 and is involved in efficient recycling of transferrin (Tfn). It is a downstream effector of Etk, a downstream tyrosine kinase of PI3-kinase that is involved in regulation of vesicle trafficking. RUFY1 contains an N-terminal RUN domain and a C-terminal FYVE domain with two coiled-coil domains in-between.

                        10        20        30        40        50
                ....*....|....*....|....*....|....*....|....*....|....*....
gi 18044523  19 WVPDKECPRCMQCDAKFDFITRKHHCRRCGKCFCDRCCSQKVPLRRmcFVDPVRQCADC 77
Cdd:cd15758   6 WLKDDEATHCKQCEKEFSISRRKHHCRNCGHIFCNTCSSNELALPS--YPKPVRVCDSC 62

FYVE domain found in FYVE finger-containing Rab5 effector protein rabenosyn-5 (Rbsn-5) and similar proteins; Rbsn-5, also termed zinc finger FYVE domain-containing protein 20, is a novel Rab5 effector that is complexed to the Sec1-like protein VPS45 and recruited in a phosphatidylinositol-3-kinase-dependent fashion to early endosomes. It also binds to Rab4 and EHD1/RME-1, two regulators of the recycling route, and is involved in cargo recycling to the plasma membrane. Moreover, Rbsn-5 regulates endocytosis at the apical side of the wing epithelium and plays a role of the apical endocytic trafficking of Fmi in the establishment of planar cell polarity (PCP).

                        10        20        30        40        50        60
                ....*....|....*....|....*....|....*....|....*....|....*....|....*.
gi 18044523  18 QWVPDKECPRCMQCDAKFDFITRKHHCRRCGKCFCDRcCSQKVPLrrmcfvdPVRQCADCALVSHR 83
Cdd:cd15716   3 PWVNDSDVPFCPDCGKKFNLARRRHHCRLCGSIMCNK-CSQFLPL-------HIRCCHHCKDLLER 60

FYVE domain found in Saccharomyces cerevisiae vacuolar protein sorting-associated protein 27 (scVps27p) and similar proteins; scVps27p, also termed Golgi retention defective protein 11, is the putative yeast counterpart of the mammalian protein Hrs and is involved in endosome maturation. It is a mono-ubiquitin-binding protein that interacts with ubiquitinated cargoes, such as Hse1p, and is required for protein sorting into the multivesicular body. Vps27p forms a complex with Hse1p. The complex binds ubiquitin and mediates endosomal protein sorting. At the endosome, Vps27p and a trimeric protein complex, ESCRT-1, bind ubiquitin and are important for multivesicular body (MVB) sorting. Vps27p contains an N-terminal VHS (Vps27/Hrs/STAM) domain, a FYVE domain that binds PtdIns3P, followed by two ubiquitin-interacting motifs (UIMs), and a C-terminal clathrin-binding motif.

                        10        20        30        40        50        60
                ....*....|....*....|....*....|....*....|....*....|....*....|..
gi 18044523  18 QWVPDkecPRCMQCDAKFDFITRKHHCRRCGKCFCDRCCSQKVPLRRMCF-VDPVRQCADCA 78
Cdd:cd15760   1 HWKPD---SRCDVCRKKFGLFKRRHHCRNCGDSFCSEHSSRRIPLPHLGPlGVPQRVCDRCF 59

FYVE domain found in FYVE, RhoGEF and PH domain-containing protein facio-genital dysplasia FGD1, FGD2, FGD4; This family represents a group of Rho GTPase cell division cycle 42 (Cdc42)-specific guanine nucleotide exchange factors (GEFs), including FYVE, RhoGEF and PH domain-containing protein FGD1, FGD2 and FGD4. FGD1, also termed faciogenital dysplasia 1 protein, or Rho/Rac guanine nucleotide exchange factor FGD1 (Rho/Rac GEF), or zinc finger FYVE domain-containing protein 3, is a central regulator of extracellular matrix remodeling and belongs to the DBL family of GEFs that regulate the activation of the Rho GTPases. FGD1 is encoded by gene FGD1. Disabling mutations in the FGD1 gene cause the human X-linked developmental disorder faciogenital dysplasia (FGDY, also known as Aarskog-Scott syndrome). FGD2, also termed zinc finger FYVE domain-containing protein 4, is expressed in antigen-presenting cells, including B lymphocytes, macrophages, and dendritic cells. It localizes to early endosomes and active membrane ruffles. It plays a role in leukocyte signaling and vesicle trafficking in cells specialized to present antigen in the immune system. FGD4, also termed actin filament-binding protein frabin, or FGD1-related F-actin-binding protein, or zinc finger FYVE domain-containing protein 6, functions as an F-actin-binding (FAB) protein showing significant homology to FGD1. It induces the formation of filopodia through the activation of Cdc42 in fibroblasts. Those FGD proteins possess a similar domain organization that contains a DBL homology (DH) domain, a pleckstrin homology (PH) domain, a FYVE domain, and another PH domain in the C-terminus. However, each FGD has a unique N-terminal region that may directly or indirectly interact with F-actin. FGD1 and FGD4 have an N-terminal proline-rich domain (PRD) and an N-terminal F-actin binding (FAB) domain, respectively. This model corresponds to the FYVE domain, which has been found in many proteins involved in membrane trafficking and phosphoinositide metabolism, and has been defined by three signature sequences: an N-terminal WxxD motif (x for any residue), the central basic R(R/K)HHCR patch, and a C-terminal RVC motif, which form a compact phosphatidylinositol 3-phosphate (PtdIns3P or PI3P)-binding site. FGD1 possesses a FYVE-like domain that lack the N-terminal WxxD motif. Moreover, FGD2 is the only known RhoGEF family member shown to have a functional FYVE domain and endosomal binding activity.

                        10        20        30        40
                ....*....|....*....|....*....|....*....|....*..
gi 18044523  17 PQWVPDKECPRCMQCDAKFDFIT-RKHHCRRCGKCFCDRCCSQKVPL 62
Cdd:cd15741   1 PRWVRDNEVTMCMRCKEPFNALTrRRHHCRACGYVVCWKCSDYKATL 47

FYVE domain found in FYVE domain-containing protein 26 (ZFY26 or ZFYVE26); ZFY26, also termed FYVE domain-containing centrosomal protein (FYVE-CENT), or spastizin, is a phosphatidylinositol 3-phosphate (PtdIns3P or PI3P) binding protein that localizes to the centrosome and midbody. ZFY26 and its interacting partners TTC19 and KIF13A are required for cytokinesis. It also interacts with Beclin 1, a subunit of class III phosphatidylinositol 3-kinase complex, and may have potential implications for carcinogenesis. In addition, it has been considered as the causal agent of a rare form of hereditary spastic paraplegia. ZFY26 contains a FYVE domain that is important for targeting of FYVE-CENT to the midbody.

                        10        20        30        40        50        60
                ....*....|....*....|....*....|....*....|....*....|....*....|
gi 18044523  19 WVPDKECPRCMQCDA-KFDFITRKHHCRRCGKCFCDRcCSQKVPLRRMCFVDPVRQCADC 77
Cdd:cd15724   1 WVPDEAVSVCMVCQVeRFSMFNRRHHCRRCGRVVCSS-CSTKKMLVEGYRENPVRVCDQC 59

FYVE domain 2 found in yeast protein VAC1 (Vac1p) and similar proteins; Vac1p, also termed vacuolar segregation protein Pep7p, or carboxypeptidase Y-deficient protein 7, or vacuolar protein sorting-associated protein 19 (Vps19p), or vacuolar protein-targeting protein 19, is a phosphatidylinositol 3-phosphate (PtdIns3P or PI3P)-binding protein that interacts with a Rab GTPase, GTP-bound form of Vps21p, and a Sec1p homologue, Vps45p, to facilitate Vps45p-dependent vesicle-mediated vacuolar protein sorting. It also acts as a novel regulator of vesicle docking and/or fusion at the endosome and functions in vesicle-mediated transport of Golgi precursor carboxypeptidase Y (CPY), protease A (PrA), protease B (PrB), but not alkaline phosphatase (ALP) from the trans-Golgi network-like compartment (TGN) to the endosome. Vac1p contains an N-terminal classical TFIIIA-like zinc finger, two putative zinc-binding FYVE fingers, and a C-terminal coiled coil region. The family corresponds to the second FYVE domain that is responsible for the ability of Pep7p to efficiently interact with Vac1p and Vps45p.

                        10        20        30        40
                ....*....|....*....|....*....|....*....|....*..
gi 18044523  19 WVPDKECPRCMQCDAKFDFITRKHHCRRCGKCFCDRC---CSQKVPL 62
Cdd:cd15737   2 WEDDSSVTHCPICLRSFGLLLRKHHCRLCGKVVCDDRrtkCSTEVPL 48

FYVE domain found in WD40 repeat and FYVE domain-containing protein 1 (WDFY1) and similar proteins; WDFY1, also termed FYVE domain containing protein localized to endosomes-1 (FENS-1), or phosphoinositide-binding protein 1, or zinc finger FYVE domain-containing protein 17, is a novel single FYVE domain containing protein that binds phosphatidylinositol 3-phosphate (PtdIns3P or PI3P) with high specificity over other phosphoinositides. WDFY1 to early endosomes requires an intact FYVE domain and is inhibited by wortmannin, a PI3-kinase inhibitor. In addition to FYVE domain, WDFY1 harbors multiple WD-40 repeats.

                        10        20        30        40        50        60
                ....*....|....*....|....*....|....*....|....*....|....*....|....*....
gi 18044523  17 PQWVPDKECPRCMQ-----CDAKFDFIT---RKHHCRRCGKCFCDRCCSQKVPLRRMCFVDPVRQCADC 77
Cdd:cd15756   1 PQWLESDSCQKCEQpffwnIKQMWDTKTlglRQHHCRKCGQAVCGKCSSKRSSYPIMGFEFQVRVCDSC 69

FYVE-related domain found in protrudin and similar proteins; Protrudin, also termed zinc finger FYVE domain-containing protein 27 (ZFY27 or ZFYVE27), is a FYVE domain-containing protein involved in transport of neuronal cargoes and implicated in the onset of hereditary spastic paraplegia (HSP). It is involved in neurite outgrowth through binding to spastin. Moreover, it functions as a key regulator of the Rab11-dependent membrane trafficking during neurite extension. It serves as an adaptor molecule that links its associated proteins, such as Rab11-GDP, VAP-A and -B, Surf4, and RTN3, to KIF5, a motor protein that mediates anterograde vesicular transport in neurons, and thus plays a key role in the maintenance of neuronal function. The FYVE domain of protrudin resembles a FYVE-related domain that is structurally similar to the canonical FYVE domains but lacks the three signature sequences: an N-terminal WxxD motif (x for any residue), the central basic R(R/K)HHCRxCG patch, and a C-terminal RVC motif. In addition, unlike canonical FYVE domains that is located to early endosomes and specifically binds to phosphatidylinositol 3-phosphate (PtdIns3P or PI3P), the FYVE domain of protrudin is located to plasma membrane and preferentially binds phosphatidylinositol 4,5-bisphosphate (PtdIns(4,5)P2), phosphatidylinositol 3,4-bisphosphate (PtdIns(3,4)P2), and phosphatidylinositol 3,4,5-trisphosphate (PtdIns(3,4,5)P3). In addition to FYVE-related domain, protrudin also contains a Rab11-binding domain (RBD11), two hydrophobic domains, HP-1 and HP-2, an FFAT motif, and a coiled-coil domain.

                        10        20        30        40        50
                ....*....|....*....|....*....|....*....|....*....|....*..
gi 18044523  28 CMQCDAKFD-FITRKHHCRRCGKCFCDRCCSQKVPLRRMCFVDP------VRQCADC 77
Cdd:cd15723   2 CTGCGASFSvLLKKRRSCNNCGNAFCSRCCSKKVPRSVMGATAPaaqretVFVCSGC 58

FYVE domain found in Saccharomyces cerevisiae vacuolar protein sorting-associated protein 27 (scVps27p) and FYVE-related domain 1 found in yeast protein VAC1 (Vac1p) and similar proteins; The family includes Saccharomyces cerevisiae vacuolar protein sorting-associated protein 27 (scVps27p) and protein VAC1 (Vac1p). scVps27p, also termed Golgi retention defective protein 11, is the putative yeast counterpart of the mammalian protein Hrs and is involved in endosome maturation. It is a mono-ubiquitin-binding protein that interacts with ubiquitinated cargoes, such as Hse1p, and is required for protein sorting into the multivesicular body. Vps27p forms a complex with Hse1p. The complex binds ubiquitin and mediates endosomal protein sorting. At the endosome, Vps27p and a trimeric protein complex, ESCRT-1, bind ubiquitin and are important for multivesicular body (MVB) sorting. Vps27p contains an N-terminal VHS (Vps27/Hrs/STAM) domain, a FYVE domain that binds PtdIns3P, followed by two ubiquitin-interacting motifs (UIMs), and a C-terminal clathrin-binding motif. Vac1p, also termed vacuolar segregation protein Pep7p, or carboxypeptidase Y-deficient protein 7, or vacuolar protein sorting-associated protein 19 (Vps19p), or vacuolar protein-targeting protein 19, is a phosphatidylinositol 3-phosphate (PtdIns3P or PI3P)-binding protein that interacts with a Rab GTPase, GTP-bound form of Vps21p, and a Sec1p homologue, Vps45p, to facilitate Vps45p-dependent vesicle-mediated vacuolar protein sorting. It also acts as a novel regulator of vesicle docking and/or fusion at the endosome and functions in vesicle-mediated transport of Golgi precursor carboxypeptidase Y (CPY), protease A (PrA), protease B (PrB), but not alkaline phosphatase (ALP) from the trans-Golgi network-like compartment (TGN) to the endosome. Vac1p contains an N-terminal classical TFIIIA-like zinc finger, two putative zinc-binding FYVE fingers, and a C-terminal coiled coil region. The FYVE domain in both Vps27p and Vac1p harbors a zinc-binding site composed of seven Cysteines and one Histidine, which is different from that of other FYVE domain containing proteins.

                        10        20        30        40        50
                ....*....|....*....|....*....|....*....|....*....|....
gi 18044523  28 CMQCDAKFDFITRKHHCRRCGKCFCDRCCSQKVPLRRMCFV----DPVRQCADC 77
Cdd:cd15736   2 CHTCSRTFNLNIRAHHCRKCGKLFCRRHLPNMIPLNLSAYDprngKWYRCCHSC 55

FYVE-related domain 1 found in yeast protein VAC1 (Vac1p) and similar proteins; Vac1p, also termed vacuolar segregation protein Pep7p, or carboxypeptidase Y-deficient protein 7, or vacuolar protein sorting-associated protein 19 (Vps19p), or vacuolar protein-targeting protein 19, is a phosphatidylinositol 3-phosphate (PtdIns3P or PI3P)-binding protein that interacts with a Rab GTPase, GTP-bound form of Vps21p, and a Sec1p homologue, Vps45p, to facilitate Vps45p-dependent vesicle-mediated vacuolar protein sorting. It also acts as a novel regulator of vesicle docking and/or fusion at the endosome and functions in vesicle-mediated transport of Golgi precursor carboxypeptidase Y (CPY), protease A (PrA), protease B (PrB), but not alkaline phosphatase (ALP) from the trans-Golgi network-like compartment (TGN) to the endosome. Vac1p contains an N-terminal classical TFIIIA-like zinc finger, two putative zinc-binding FYVE fingers, and a C-terminal coiled coil region. The family corresponds to the first FYVE domain, which resembles the FYVE-related domain as it has an altered sequence in the basic ligand binding patch.

                        10        20        30        40        50        60
                ....*....|....*....|....*....|....*....|....*....|....*....|....
gi 18044523  19 WVPDKECPRCMQCDAKFDFITRKHHCRRCGKCFCDRCCSQKVPLRRMCFVDPV-----RQCADC 77
Cdd:cd15761   4 WKKPSGKSRCSECGKTLNKKNGIVNCRKCGELFCNEHCRNRIKLNNSAEYDPKngkwcRCCEKC 67

FYVE domain found in WD40 repeat and FYVE domain-containing protein 2 (WDFY2); WDFY2, also termed zinc finger FYVE domain-containing protein 22, or ProF (propeller-FYVE protein), is a phosphatidylinositol 3-phosphate (PtdIns3P or PI3P) binding protein that is localized to a distinct subset of early endosomes close to the plasma membrane. It interacts preferentially with endogenous serine/threonine kinase Akt2, but not Akt1, and plays a specific role in modulating signaling through Akt downstream of the interaction of this kinase with the endosomal proteins APPL (adaptor protein containing PH domain, PTB domain, and leucine zipper motif). In addition to Akt, WDFY2 serves as a binding partner for protein kinase C, zeta (PRKCZ), and its substrate vesicle-associated membrane protein 2 (VAMP2), and is involved in vesicle cycling in various secretory pathways. Moreover, Silencing of WDFY2 by siRNA produces a strong inhibition of endocytosis. WDFY2 contains WD40 motifs and a FYVE domain.

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                ....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 18044523  17 PQWVPDKECPRCMQ---------CDAKfDFITRKHHCRRCGKCFCDRCCSQKVPLRRMCFVDPVRQCADC 77
Cdd:cd15757   1 PEWLDSDSCQKCDQpffwnfkqmWDSK-KIGLRQHHCRKCGKAVCGKCSSKRSTIPLMGFEFEVRVCDSC 69

FYVE-related domain found in RUN and FYVE domain-containing protein 4 (RUFY4) and similar proteins; RUFY4 belongs to the FUFY protein family which is characterized by the presence of an N-terminal RUN domain and a C-terminal FYVE domain. The FYVE domain of RUFY4 resembles the FYVE-related domain as it lacks the WxxD motif (x for any residue). The biological function of RUFY4 still remains unclear.

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                ....*....|....*....|....*....|....*....|....*....|
gi 18044523  28 CMQCDAKFDFITRKHHCRRCGKCFCDRCCSQKVPLRRMCFVDPVRQCADC 77
Cdd:cd15745   2 CAICAKAFSLFRRKYVCRLCGGVVCHSCSSEDLVLSVPDTCIYLRVCKTC 51

FYVE-related domain found in RUN and FYVE domain-containing protein 3 (RUFY3) and similar proteins; RUFY3, also termed Rap2-interacting protein x (RIPx or RPIPx), or single axon-regulated protein (singar), is an N-terminal RUN domain and a C-terminal FYVE domain containing protein predominantly expressed in the brain. It suppresses formation of surplus axons for neuronal polarity. Unlike other RUFY proteins, RUFY3 can associate with the GTP-bound active form of Rab5. Moreover, the FYVE domain of RUFY3 resembles the FYVE-related domain as it lacks the WxxD motif (x for any residue).

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                ....*....|....*....|....*....|....*....|....*....|..
gi 18044523  27 RCMQCDAKFDFITR-KHHCRRCGKCFCDRCCSQKVPLrRMCFVDPVRQCADC 77
Cdd:cd15744   1 SCSLCQEDFASLALpKHNCYNCGGTFCDACSSNELPL-PSSIYEPARVCDVC 51

phosphatidylinositol kinase; Provisional

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                  ....*....|....*....|....*....|....*....|....*....|....*....|..
gi 18044523     4 EHRAFGSPFGLEEPQWVPDKE----CPRCMQCDAKFD--FITRKHHCRRCGKCFCDRCCSQK 59
Cdd:PTZ00303  438 ELNTFGLTKLLHNPSWQKDDEssdsCPSCGRAFISLSrpLGTRAHHCRSCGIRLCVFCITKR 499