Biology:Carboxypeptidase D
| Carboxypeptidase D | |||||||||
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| Identifiers | |||||||||
| EC number | 3.4.16.6 | ||||||||
| CAS number | 153967-26-1 | ||||||||
| Databases | |||||||||
| IntEnz | IntEnz view | ||||||||
| BRENDA | BRENDA entry | ||||||||
| ExPASy | NiceZyme view | ||||||||
| KEGG | KEGG entry | ||||||||
| MetaCyc | metabolic pathway | ||||||||
| PRIAM | profile | ||||||||
| PDB structures | RCSB PDB PDBe PDBsum | ||||||||
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Carboxypeptidase D can refer to one of several enzymes. A family of serine carboxypeptidases (i.e. enzymes that use an active site serine residue) includes (EC 3.4.16.6, cereal serine carboxypeptidase II, Saccharomyces cerevisiae KEX1 gene product, carboxypeptidase Kex1, gene KEX1 serine carboxypeptidase, KEX1 carboxypeptidase, KEX1 proteinase, KEX1DELTAp, CPDW-II, serine carboxypeptidase, Phaseolus proteinase) is an enzyme.[1][2][3][4] This enzyme has an optimal pH of 4.5-6.0, is inhibited by diisopropyl fluorophosphate, and catalyses the following chemical reaction
A completely distinct enzyme has also been named carboxypeptidase D (EC number 3.4.17.22). This second enzyme is a metallocarboxypeptidase (i.e. uses a zinc ion in the active site instead of a serine residue) and is broadly expressed in mammalian tissues.[5] Like the serine carboxypeptidase, the metallocarboxypeptidase D also removes C-terminal arginine or lysine residues from peptides, with an optimal pH range of 5 to 7. Metallocarboxypeptidase D is located in the trans Golgi network where it contributes to the biosynthesis of neuropeptides and peptide hormones (such as insulin) along with carboxypeptidase E. In addition to this role, metallocarboxypeptidase D contributes to the processing of proteins, following the action of furin (an endoprotease located in the trans Golgi network). The duck ortholog of metallocarboxypeptidase D was named gp180 and is a receptor for uptake of duck hepatitis B virus.[6] In fruit fly (Drosophila melanogaster), carboxypeptidase D is known as the silver mutation, with defects causing altered wing shape.[7] Metallocarboxypeptidase D is generally a membrane-bound protein, although in some organisms a soluble form is generated by either differential RNA splicing or by proteolytic activity.[8][9] In the scientific literature, most of the published articles using the name "Carboxypeptidase D" in the title refer to metallocarboxypeptidase D and not the serine carboxypeptidase.
References
- ↑ Breddam, K. (1986). "Serine carboxypeptidases. A review". Carlsberg Res. Commun. 51 (2): 83–128. doi:10.1007/bf02907561.
- ↑ Breddam, K.; Sørensen, S.B.; Svendsen, I. (1987). "Primary structure and enzymatic properties of carboxypeptidase II from wheat bran". Carlsberg Res. Commun. 52 (4): 297–311. doi:10.1007/bf02907172.
- ↑ Dmochowska, A.; Dignard, D.; Henning, D.; Thomas, D.Y.; Bussey, H. (1987). "Yeast KEX1 gene encodes a putative protease with a carboxypeptidase B-like function involved in killer toxin and α-factor precursor processing". Cell 50 (4): 573–584. doi:10.1016/0092-8674(87)90030-4. PMID 3301004.
- ↑ Liao, D.-I.; Breddam, K.; Sweet, R.M.; Bullock, T.; Remington, S.J. (1992). "Refined atomic model of wheat serine carboxypeptidase II at 2.2-Å resolution". Biochemistry 31 (40): 9796–9812. doi:10.1021/bi00155a037. PMID 1390755.
- ↑ "Purification and characterization of carboxypeptidase D, a novel carboxypeptidase E-like enzyme, from bovine pituitary". J. Biol. Chem. 270 (42): 25007–13. 1995. doi:10.1074/jbc.270.42.25007. PMID 7559630.
- ↑ "gp180, a protein that binds duck hepatitis B virus particles, has metallocarboxypeptidase D-like enzymatic activity.". J. Biol. Chem. 273 (14): 8382–8. 1998. doi:10.1074/jbc.273.14.8382. PMID 9525948.
- ↑ "The silver gene of Drosophila melanogaster encodes multiple carboxypeptidases similar to mammalian prohormone-processing enzymes.". Proc Natl Acad Sci U S A 92 (21): 9470–4. 1995. doi:10.1073/pnas.92.21.9470. PMID 7568156. Bibcode: 1995PNAS...92.9470S.
- ↑ "Characterization of Drosophila carboxypeptidase D". J. Biol. Chem. 277 (51): 49613–20. 2002. doi:10.1074/jbc.M209652200. PMID 12393882.
- ↑ "Tissue distribution and characterization of soluble and membrane-bound forms of metallocarboxypeptidase D.". J. Biol. Chem. 271 (46): 28884–9. 1996. doi:10.1074/jbc.271.46.28884. PMID 8910535.
External links
- Carboxypeptidase+D at the US National Library of Medicine Medical Subject Headings (MeSH)
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