ubiquitin conjugation factor E4 A isoform X2 [Mus musculus]
Protein Classification
ubiquitin conjugation factor E4( domain architecture ID 12105733)
ubiquitin conjugation factor E4 is a ubiquitin-protein ligase that probably functions as an E3 ligase in conjunction with specific E1 and E2 ligases, and may also function as an E4 ligase mediating the assembly of polyubiquitin chains on substrates ubiquitinated by another E3 ubiquitin ligase
List of domain hits
| Name | Accession | Description | Interval | E-value | ||||||||||
| Ufd2P_core | pfam10408 | Ubiquitin elongating factor core; This is the most conserved part of the core region of Ufd2P ... |
330-971 | 0e+00 | ||||||||||
Ubiquitin elongating factor core; This is the most conserved part of the core region of Ufd2P ubiquitin elongating factor or E4, running from helix alpha-11 to alpha-38. It consists of 31 helices of variable length connected by loops of variable size forming a compact unit; the helical packing pattern of the compact unit consists of five structural repeats that resemble tandem Armadillo (ARM) repeats. This domain is involved in ubiquitination as it binds Cdc48p and escorts ubiquitinated proteins from Cdc48p to the proteasome for degradation. The core is structurally similar to the nuclear transporter protein importin-alpha. The core is associated with the U-box at the C-terminus, pfam04564, which has ligase activity. : Pssm-ID: 463080 Cd Length: 594 Bit Score: 546.40 E-value: 0e+00
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| RING-Ubox_UBE4A | cd16657 | U-box domain, a modified RING finger, found in ubiquitin conjugation factor E4 A (UBE4A) and ... |
990-1059 | 1.12e-45 | ||||||||||
U-box domain, a modified RING finger, found in ubiquitin conjugation factor E4 A (UBE4A) and similar proteins; This subfamily includes yeast ubiquitin fusion degradation protein 2 (UFD2p) and its mammalian homolog, UBE4A. Yeast UFD2p, also known as ubiquitin conjugation factor E4 or UB fusion protein 2, is a polyubiquitin chain conjugation factor (E4) in the ubiquitin fusion degradation (UFD) pathway which catalyzes elongation of the ubiquitin chain through Lys48 linkage. It binds to substrates conjugated with one to three ubiquitin molecules and catalyzes the addition of further ubiquitin moieties in the presence of ubiquitin-activating enzyme (E1), ubiquitin-conjugating enzyme (E2) and ubiquitin ligase (E3), yielding multiubiquitylated substrates that are targets for the 26S proteasome. UFD2p is implicated in cell survival under stress conditions and is essential for homoeostasis of unsaturated fatty acids. It interacts with UBL-UBA proteins Rad23 and Dsk2, which are involved in the endoplasmic reticulum-associated degradation, ubiquitin fusion degradation, and OLE-1 gene induction pathways. UBE4A is a U-box-type ubiquitin-protein ligase that is located in common neuroblastoma deletion regions and may be subject to mutations in tumors. It may have a specific role in different biochemical processes other than ubiquitination, including growth or differentiation. Members of this family contain an N-terminal ubiquitin elongating factor core and a RING-like U-box domain at the C-terminus. : Pssm-ID: 438319 Cd Length: 70 Bit Score: 158.21 E-value: 1.12e-45
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| Name | Accession | Description | Interval | E-value | |||||||||||||
| Ufd2P_core | pfam10408 | Ubiquitin elongating factor core; This is the most conserved part of the core region of Ufd2P ... |
330-971 | 0e+00 | |||||||||||||
Ubiquitin elongating factor core; This is the most conserved part of the core region of Ufd2P ubiquitin elongating factor or E4, running from helix alpha-11 to alpha-38. It consists of 31 helices of variable length connected by loops of variable size forming a compact unit; the helical packing pattern of the compact unit consists of five structural repeats that resemble tandem Armadillo (ARM) repeats. This domain is involved in ubiquitination as it binds Cdc48p and escorts ubiquitinated proteins from Cdc48p to the proteasome for degradation. The core is structurally similar to the nuclear transporter protein importin-alpha. The core is associated with the U-box at the C-terminus, pfam04564, which has ligase activity. Pssm-ID: 463080 Cd Length: 594 Bit Score: 546.40 E-value: 0e+00
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| UFD2 | COG5113 | Ubiquitin fusion degradation protein 2 [Posttranslational modification, protein turnover, ... |
170-1066 | 3.21e-86 | |||||||||||||
Ubiquitin fusion degradation protein 2 [Posttranslational modification, protein turnover, chaperones]; Pssm-ID: 227444 [Multi-domain] Cd Length: 929 Bit Score: 298.82 E-value: 3.21e-86
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| RING-Ubox_UBE4A | cd16657 | U-box domain, a modified RING finger, found in ubiquitin conjugation factor E4 A (UBE4A) and ... |
990-1059 | 1.12e-45 | |||||||||||||
U-box domain, a modified RING finger, found in ubiquitin conjugation factor E4 A (UBE4A) and similar proteins; This subfamily includes yeast ubiquitin fusion degradation protein 2 (UFD2p) and its mammalian homolog, UBE4A. Yeast UFD2p, also known as ubiquitin conjugation factor E4 or UB fusion protein 2, is a polyubiquitin chain conjugation factor (E4) in the ubiquitin fusion degradation (UFD) pathway which catalyzes elongation of the ubiquitin chain through Lys48 linkage. It binds to substrates conjugated with one to three ubiquitin molecules and catalyzes the addition of further ubiquitin moieties in the presence of ubiquitin-activating enzyme (E1), ubiquitin-conjugating enzyme (E2) and ubiquitin ligase (E3), yielding multiubiquitylated substrates that are targets for the 26S proteasome. UFD2p is implicated in cell survival under stress conditions and is essential for homoeostasis of unsaturated fatty acids. It interacts with UBL-UBA proteins Rad23 and Dsk2, which are involved in the endoplasmic reticulum-associated degradation, ubiquitin fusion degradation, and OLE-1 gene induction pathways. UBE4A is a U-box-type ubiquitin-protein ligase that is located in common neuroblastoma deletion regions and may be subject to mutations in tumors. It may have a specific role in different biochemical processes other than ubiquitination, including growth or differentiation. Members of this family contain an N-terminal ubiquitin elongating factor core and a RING-like U-box domain at the C-terminus. Pssm-ID: 438319 Cd Length: 70 Bit Score: 158.21 E-value: 1.12e-45
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| U-box | pfam04564 | U-box domain; The U-box is a domain of ~70 amino acids that is present in proteins from yeast ... |
988-1060 | 1.92e-33 | |||||||||||||
U-box domain; The U-box is a domain of ~70 amino acids that is present in proteins from yeast to human. It consists of the beta-beta-alpha-beta-alpha- fold typical of U-box and RING domains. The central alpha helix is flanked by two prominent surface-exposed loop regions. This domain is one class of E3 ligases, involved in the ubiquitination process. This domain is related to the Ring finger pfam00097 but lacks the zinc binding residues. Pssm-ID: 398320 [Multi-domain] Cd Length: 73 Bit Score: 123.19 E-value: 1.92e-33
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| Ubox | smart00504 | Modified RING finger domain; Modified RING finger domain, without the full complement of Zn2 ... |
991-1054 | 6.31e-23 | |||||||||||||
Modified RING finger domain; Modified RING finger domain, without the full complement of Zn2+-binding ligands. Probable involvement in E2-dependent ubiquitination. Pssm-ID: 128780 [Multi-domain] Cd Length: 63 Bit Score: 93.07 E-value: 6.31e-23
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| Name | Accession | Description | Interval | E-value | |||||||||||||
| Ufd2P_core | pfam10408 | Ubiquitin elongating factor core; This is the most conserved part of the core region of Ufd2P ... |
330-971 | 0e+00 | |||||||||||||
Ubiquitin elongating factor core; This is the most conserved part of the core region of Ufd2P ubiquitin elongating factor or E4, running from helix alpha-11 to alpha-38. It consists of 31 helices of variable length connected by loops of variable size forming a compact unit; the helical packing pattern of the compact unit consists of five structural repeats that resemble tandem Armadillo (ARM) repeats. This domain is involved in ubiquitination as it binds Cdc48p and escorts ubiquitinated proteins from Cdc48p to the proteasome for degradation. The core is structurally similar to the nuclear transporter protein importin-alpha. The core is associated with the U-box at the C-terminus, pfam04564, which has ligase activity. Pssm-ID: 463080 Cd Length: 594 Bit Score: 546.40 E-value: 0e+00
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| UFD2 | COG5113 | Ubiquitin fusion degradation protein 2 [Posttranslational modification, protein turnover, ... |
170-1066 | 3.21e-86 | |||||||||||||
Ubiquitin fusion degradation protein 2 [Posttranslational modification, protein turnover, chaperones]; Pssm-ID: 227444 [Multi-domain] Cd Length: 929 Bit Score: 298.82 E-value: 3.21e-86
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| RING-Ubox_UBE4A | cd16657 | U-box domain, a modified RING finger, found in ubiquitin conjugation factor E4 A (UBE4A) and ... |
990-1059 | 1.12e-45 | |||||||||||||
U-box domain, a modified RING finger, found in ubiquitin conjugation factor E4 A (UBE4A) and similar proteins; This subfamily includes yeast ubiquitin fusion degradation protein 2 (UFD2p) and its mammalian homolog, UBE4A. Yeast UFD2p, also known as ubiquitin conjugation factor E4 or UB fusion protein 2, is a polyubiquitin chain conjugation factor (E4) in the ubiquitin fusion degradation (UFD) pathway which catalyzes elongation of the ubiquitin chain through Lys48 linkage. It binds to substrates conjugated with one to three ubiquitin molecules and catalyzes the addition of further ubiquitin moieties in the presence of ubiquitin-activating enzyme (E1), ubiquitin-conjugating enzyme (E2) and ubiquitin ligase (E3), yielding multiubiquitylated substrates that are targets for the 26S proteasome. UFD2p is implicated in cell survival under stress conditions and is essential for homoeostasis of unsaturated fatty acids. It interacts with UBL-UBA proteins Rad23 and Dsk2, which are involved in the endoplasmic reticulum-associated degradation, ubiquitin fusion degradation, and OLE-1 gene induction pathways. UBE4A is a U-box-type ubiquitin-protein ligase that is located in common neuroblastoma deletion regions and may be subject to mutations in tumors. It may have a specific role in different biochemical processes other than ubiquitination, including growth or differentiation. Members of this family contain an N-terminal ubiquitin elongating factor core and a RING-like U-box domain at the C-terminus. Pssm-ID: 438319 Cd Length: 70 Bit Score: 158.21 E-value: 1.12e-45
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| RING-Ubox_UBE4B | cd16658 | U-box domain, a modified RING finger, found in ubiquitin conjugation factor E4 B (UBE4B) and ... |
985-1059 | 3.88e-38 | |||||||||||||
U-box domain, a modified RING finger, found in ubiquitin conjugation factor E4 B (UBE4B) and similar proteins; UBE4B, also known as UFD2a, is a U-box-type ubiquitin-protein ligase that functions as an E3 ubiquitin ligase and an E4 polyubiquitin chain elongation factor, which catalyzes formation of Lys27- and Lys33-linked polyubiquitin chains rather than the Lys48-linked chain. It is a mammalian homolog of yeast UFD2 ubiquitination factor and it participates in the proteasomal degradation of misfolded or damaged proteins through association with chaperones. It is located in common neuroblastoma deletion regions and may be subject to mutations in tumors. UBE4B has contradictory functions upon tumorigenesis as an oncogene or tumor suppressor in different types of cancers. It is essential for Hdm2 (also known as Mdm2)-mediated p53 degradation. It mediates p53 polyubiquitination and degradation, as well as inhibits p53-dependent transactivation and apoptosis, and thus plays an important role in regulating phosphorylated p53 following DNA damage. UBE4B is also associated with other pathways independent of the p53 family, such as polyglutamine aggregation and Wallerian degeneration, both of which are critical in neurodegenerative diseases. Moreover, UBE4B acts as a regulator of epidermal growth factor receptor (EGFR) degradation. It is recruited to endosomes in response to EGFR activation by binding to Hrs, a key component of endosomal sorting complex required for transport (ESCRT) 0, and then regulates endosomal sorting, affecting cellular levels of the EGFR and its downstream signaling. UBE4B contains a ubiquitin elongating factor core and a RING-like U-box domain at the C-terminus. Pssm-ID: 438320 Cd Length: 74 Bit Score: 136.64 E-value: 3.88e-38
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| U-box | pfam04564 | U-box domain; The U-box is a domain of ~70 amino acids that is present in proteins from yeast ... |
988-1060 | 1.92e-33 | |||||||||||||
U-box domain; The U-box is a domain of ~70 amino acids that is present in proteins from yeast to human. It consists of the beta-beta-alpha-beta-alpha- fold typical of U-box and RING domains. The central alpha helix is flanked by two prominent surface-exposed loop regions. This domain is one class of E3 ligases, involved in the ubiquitination process. This domain is related to the Ring finger pfam00097 but lacks the zinc binding residues. Pssm-ID: 398320 [Multi-domain] Cd Length: 73 Bit Score: 123.19 E-value: 1.92e-33
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| Ubox | smart00504 | Modified RING finger domain; Modified RING finger domain, without the full complement of Zn2 ... |
991-1054 | 6.31e-23 | |||||||||||||
Modified RING finger domain; Modified RING finger domain, without the full complement of Zn2+-binding ligands. Probable involvement in E2-dependent ubiquitination. Pssm-ID: 128780 [Multi-domain] Cd Length: 63 Bit Score: 93.07 E-value: 6.31e-23
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| RING-Ubox | cd16453 | U-box domain, a modified RING finger; The U-box protein family is a family of E3 enzymes that ... |
992-1036 | 4.03e-15 | |||||||||||||
U-box domain, a modified RING finger; The U-box protein family is a family of E3 enzymes that also includes the HECT family and the RING finger family. The E3 enzyme is ubiquitin-protein ligase that cooperates with a ubiquitin-activating enzyme (E1) and a ubiquitin-conjugating enzyme (E2), and plays a central role in determining the specificity of the ubiquitination system. It removes the ubiquitin molecule from the E2 enzyme and attaches it to the target substrate, forming a covalent bond between ubiquitin and the target. U-box proteins are characterized by the presence of a U-box domain of approximately 70 amino acids. The U-box is a modified form of the RING finger domain that lacks metal chelating cysteines and histidines. It resembles the cross-brace RING structure consisting of three beta-sheets and a single alpha-helix, which would be stabilized by salt bridges instead of chelated metal ions. U-box proteins are widely distributed among eukaryotic organisms and show a higher prevalence in plants than in other organisms. Pssm-ID: 438117 [Multi-domain] Cd Length: 44 Bit Score: 70.28 E-value: 4.03e-15
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| RING-Ubox_CHIP | cd16654 | U-box domain, a modified RING finger, found in carboxyl terminus of HSP70-interacting protein ... |
990-1057 | 1.05e-12 | |||||||||||||
U-box domain, a modified RING finger, found in carboxyl terminus of HSP70-interacting protein (CHIP) and similar proteins; CHIP, also known as STIP1 homology and U box-containing protein 1 (STUB1), CLL-associated antigen KW-8, or Antigen NY-CO-7, is a multifunctional protein that functions both as a co-chaperone and an E3 ubiquitin-protein ligase. It couples protein folding and proteasome mediated degradation by interacting with heat shock proteins (e.g. HSC70) and ubiquitinating their misfolded client proteins, thereby targeting them for proteasomal degradation. It is also important for cellular differentiation and survival (or apoptosis), as well as susceptibility to stress. It targets a wide range of proteins, such as expanded ataxin-1, ataxin-3, huntingtin, and androgen receptor, which play roles in glucocorticoid response, tau degradation, and both p53 and cAMP signaling. CHIP contains an N-terminal tetratricopeptide repeat (TPR) domain responsible for protein-protein interaction, a highly charged middle coiled-coil (CC), and a C-terminal RING-like U-box domain acting as an ubiquitin ligase. Pssm-ID: 438316 [Multi-domain] Cd Length: 71 Bit Score: 64.13 E-value: 1.05e-12
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| RING-Ubox_RNF37 | cd16660 | U-box domain, a modified RING finger, found in RING finger protein 37 (RNF37); RNF37, also ... |
990-1031 | 7.34e-09 | |||||||||||||
U-box domain, a modified RING finger, found in RING finger protein 37 (RNF37); RNF37, also known as KIAA0860, U-box domain-containing protein 5 (UBOX5), UbcM4-interacting protein 5 (UIP5), or ubiquitin-conjugating enzyme 7-interacting protein 5, is an E3 ubiquitin-protein ligase found exclusively in the nucleus as part of a nuclear dot-like structure. It interacts with the molecular chaperone VCP/p97 protein. RNF37 contains a U-box domain followed by a potential nuclear location signal (NLS), and a C-terminal C3HC4-type RING-HC finger. The U-box domain is a modified RING finger domain that lacks the hallmark metal-chelating cysteines and histidines of the latter, but is likely to adopt a RING finger-like conformation. The presence of the U-box, but not of the RING finger, is required for the E3 activity. The U-box domain can directly interact with several E2 enzymes, including UbcM2, UbcM3, UbcM4, UbcH5, and UbcH8, suggesting a similar function as the RING finger in the ubiquitination pathway. This model corresponds to the U-box domain. Pssm-ID: 438322 Cd Length: 53 Bit Score: 52.70 E-value: 7.34e-09
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| RING-Ubox_LubX-like_rpt1 | cd23149 | first U-box domain, a modified RING finger, found in Legionella pneumophila U-box protein LubX ... |
992-1047 | 1.74e-08 | |||||||||||||
first U-box domain, a modified RING finger, found in Legionella pneumophila U-box protein LubX and similar proteins; LubX, also called RING-type E3 ubiquitin transferase LubX, is part of the large arsenal of effectors in Legionella pneumophila that are translocated into the host cytosol during infection. LubX acts as an E3 ubiquitin-protein ligase (EC 2.3.2.27) that interferes with the host's ubiquitination pathway. LubX contains two RING-like U-box domains. U-box 1 is critical to the ubiquitin ligase activity, and U-box 2 mediates interaction with host target. This model corresponds to the first one. Pssm-ID: 438511 [Multi-domain] Cd Length: 55 Bit Score: 51.72 E-value: 1.74e-08
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| RING-Ubox_LubX-like_rpt2 | cd23150 | second U-box domain, a modified RING finger, found in Legionella pneumophila U-box protein ... |
992-1058 | 8.21e-08 | |||||||||||||
second U-box domain, a modified RING finger, found in Legionella pneumophila U-box protein LubX and similar proteins; LubX, also called RING-type E3 ubiquitin transferase LubX, is part of the large arsenal of effectors in Legionella pneumophila that are translocated into the host cytosol during infection. LubX acts as an E3 ubiquitin-protein ligase (EC 2.3.2.27) that interferes with the host's ubiquitination pathway. LubX contains two RING-like U-box domains. U-box 1 is critical to the ubiquitin ligase activity, and U-box 2 mediates interaction with host target. This model corresponds to the second one. Pssm-ID: 438512 [Multi-domain] Cd Length: 69 Bit Score: 50.16 E-value: 8.21e-08
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| RING_Ubox | cd00162 | RING finger (Really Interesting New Gene) domain and U-box domain superfamily; The RING finger ... |
994-1032 | 3.08e-07 | |||||||||||||
RING finger (Really Interesting New Gene) domain and U-box domain superfamily; The RING finger is a specialized type of Zn-finger of 40 to 60 residues that binds two atoms of zinc. It is defined by the "cross-brace" motif that chelates zinc atoms by eight amino acid residues, typically Cys or His, arranged in a characteristic spacing. Canonical RING motifs have been categorized into two major subclasses, RING-HC (C3HC4-type) and RING-H2 (C3H2C3-type), according to their Cys/His content. There are also many variants of RING fingers: some have different Cys/His patterns while some lack a single Cys or His residue at typical Zn ligand positions (the fourth or eighth zinc ligand is prevalently exchanged for an Asp, which can indeed chelate Zn in a RING finger as well). C4C4-, C3HC3D-, C2H2C4-, and C3HC5-type RING fingers are closely related to RING-HC fingers. In contrast, C4HC3- (RING-CH alias RINGv), C3H3C2-, C3H2C2D-, C3DHC3-, and C4HC2H-type RING fingers are more closely related to RING-H2 fingers. However, not all RING finger-containing proteins display regular RING finger features, and the RING finger family has turned out to be multifarious. The degenerate RING fingers of the Siz/PIAS RING (SP-RING) family proteins and sporulation protein RMD5, are characterized by lacking the second, fifth, and sixth Zn2+ ion-coordinating residues. They bind only one Zn2+ ion. On the other hand, the RING fingers of the human APC11 and RBX1 proteins can bind a third Zn atom since they harbor four additional Zn ligands. U-box is a modified form of the RING finger domain that lacks metal chelating Cys and His residues. It resembles the cross-brace RING structure consisting of three beta-sheets and a single alpha-helix, which would be stabilized by salt bridges instead of chelated metal ions. U-box proteins are widely distributed among eukaryotic organisms and show a higher prevalence in plants than in other organisms. RING finger/U-box-containing proteins are a group of diverse proteins with a variety of cellular functions, including oncogenesis, development, viral replication, signal transduction, the cell cycle and apoptosis. Many of them are ubiquitin-protein ligases (E3s) that serve as scaffolds for binding to ubiquitin-conjugating enzymes (E2s, also referred to as ubiquitin carrier proteins or UBCs) in close proximity to substrate proteins, which enable efficient transfer of ubiquitin from E2 to the substrates. Pssm-ID: 438111 [Multi-domain] Cd Length: 42 Bit Score: 47.84 E-value: 3.08e-07
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| RING-Ubox_WDSUB1-like | cd16655 | U-box domain, a modified RING finger, found in WD repeat, SAM and U-box domain-containing ... |
990-1044 | 3.56e-07 | |||||||||||||
U-box domain, a modified RING finger, found in WD repeat, SAM and U-box domain-containing protein 1 (WDSUB1) and similar proteins; WDSUB1 is an uncharacterized protein containing seven WD40 repeats and a SAM domain in addition to the U-box. Its biological role remains unclear. This subfamily also includes many uncharacterized kinase domain-containing U-box (AtPUB) proteins and several MIF4G motif-containing AtPUB proteins from Arabidopsis. Pssm-ID: 438317 [Multi-domain] Cd Length: 55 Bit Score: 47.88 E-value: 3.56e-07
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| RING-Ubox_PUB | cd16664 | U-box domain, a modified RING finger, found in Arabidopsis plant U-box proteins (AtPUB) and ... |
990-1040 | 2.29e-03 | |||||||||||||
U-box domain, a modified RING finger, found in Arabidopsis plant U-box proteins (AtPUB) and similar proteins; The plant PUB proteins, also known as U-box domain-containing proteins, are much more numerous in Arabidopsis which has 62 in comparison with the typical 6 in most animals. The majority of AtPUBs in this subfamily are known as ARM domain-containing PUB proteins, containing a C-terminally-located, tandem ARM (armadillo) repeat protein-interaction region in addition to the U-box domain. They have been implicated in the regulation of cell death and defense. They also play important roles in other plant-specific pathways, such as controlling both self-incompatibility and pseudo-self-incompatibility, as well as acting in abiotic stress. A subgroup of ARM domain-containing PUB proteins harbors a plant-specific U-box N-terminal domain. Pssm-ID: 438326 [Multi-domain] Cd Length: 53 Bit Score: 37.16 E-value: 2.29e-03
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