cd10238: HSPA14-like_NBD (this model, PSSM-Id:212680 is obsolete and has been replaced by 466836)
Nucleotide-binding domain of human HSPA14 and similar proteins
Human HSPA14 (also known as 70-kDa heat shock protein 14, HSP70L1, HSP70-4; the gene encoding HSPA14 maps to 10p13), is ribosome-associated and belongs to the heat shock protein 70 (HSP70) family of chaperones that assist in protein folding and assembly, and can direct incompetent "client" proteins towards degradation. Typically, HSP70s have a nucleotide-binding domain (NBD) and a substrate-binding domain (SBD). The nucleotide sits in a deep cleft formed between the two lobes of the NBD. The two subdomains of each lobe change conformation between ATP-bound, ADP-bound, and nucleotide-free states. ATP binding opens up the substrate-binding site; substrate-binding increases the rate of ATP hydrolysis. HSP70 chaperone activity is regulated by various co-chaperones: J-domain proteins and nucleotide exchange factors (NEFs). HSPA14 interacts with the J-protein MPP11 to form the mammalian ribosome-associated complex (mRAC). HSPA14 participates in a pathway along with Nijmegen breakage syndrome 1 (NBS1, also known as p85 or nibrin), heat shock transcription factor 4b (HSF4b), and HSPA4 (belonging to a different subfamily), that induces tumor migration, invasion, and transformation. HSPA14 is a potent T helper cell (Th1) polarizing adjuvant that contributes to antitumor immune responses.
Jiyao W et al.(2023). "The conserved domain database in 2023.",