Hidroksimetilbilan sintaza

Hidroksimetilbilan sintaza
Identifikatori
EC broj2.5.1.61
CAS broj9074-91-3
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IntEnzIntEnz pregled
BRENDABRENDA pristup
ExPASyNiceZyme pregled
KEGGKEGG pristup
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Strukture PBPRCSB PDB PDBe PDBj PDBsum
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Hidroksimetilbilan sintaza (EC 2.5.1.61, HMB-sintaza, porphobilinogen deaminaza, pre-uroporfirinogen sintaza, uroporfirinogen I sintaza, uroporfirinogen I sintetaza, uroporfirinogen sintaza, uroporfirinogen sintetaza, porfobilinogen amonijak-lijaza (polimerizacija), (4-(2-karboksietil)-3-(karboksimetil)pirol-2-il)metiltransferaza (hidrolizacija)) je enzim sa sistematskim imenom porfobilinogen:(4-(2-karboksietil)-3-(karboksimetil)pirrol-2-il)metiltransferaza (hidroliza).[1][2][3][4][5][6] Ovaj enzim katalizuje sledeću hemijsku reakciju

4 porfobilinogen +H2O {\displaystyle \rightleftharpoons } hidroksimetilbilan + 4 NH3

Ovaj enzim deluje putem postepene adicije pirolilmetilnih grupa.

Reference

  1. ^ Battersby, A.R., Fookes, C.J.R., Matcham, G.W.J. and McDonald, E. (1980). „Biosynthesis of the pigments of life: formation of the macrocycle”. Nature. 285: 17—21. PMID 6769048. CS1 одржавање: Вишеструка имена: списак аутора (веза)
  2. ^ Frydman, R.B. & Feinstein, G. (1974). „Studies on porphobilinogen deaminase and uroporphyrinogen 3 cosynthase from human erythrocytes”. Biochim. Biophys. Acta. 350: 358—373. PMID 4847568. 
  3. ^ Levin, E.Y. & Coleman, D.L. (1967). „The enzymatic conversion of porphobilinogen to uroporphyrinogen catalyzed by extracts of hematopoietic mouse spleen”. J. Biol. Chem. 242: 4247—4253. PMID 6061709. 
  4. ^ Warren, M.J. & Jordan, P.M. (1988). „Investigation into the nature of substrate binding to the dipyrromethane cofactor of Escherichia coli porphobilinogen deaminase”. Biochemistry. 27: 9020—9030. PMID 3069132. 
  5. ^ Miller, A.D., Hart, G.J., Packman, L.C. and Battersby, A.R. (1988). „Evidence that the pyrromethane cofactor of hydroxymethylbilane synthase (porphobilinogen deaminase) is bound to the protein through the sulphur atom of cysteine-242”. Biochem. J. 254: 915—918. PMID 3196304. CS1 одржавање: Вишеструка имена: списак аутора (веза)
  6. ^ Battersby, A.R. (2000). „Tetrapyrroles: the pigments of life”. Nat. Prod. Rep. 17: 507—526. PMID 11152419. 

Literatura

  • Nicholas C. Price; Lewis Stevens (1999). Fundamentals of Enzymology: The Cell and Molecular Biology of Catalytic Proteins (Third изд.). USA: Oxford University Press. ISBN 019850229X. 
  • Eric J. Toone (2006). Advances in Enzymology and Related Areas of Molecular Biology, Protein Evolution (Volume 75 изд.). Wiley-Interscience. ISBN 0471205036. 
  • Branden C; Tooze J. Introduction to Protein Structure. New York, NY: Garland Publishing. ISBN 0-8153-2305-0. 
  • Irwin H. Segel. Enzyme Kinetics: Behavior and Analysis of Rapid Equilibrium and Steady-State Enzyme Systems (Book 44 изд.). Wiley Classics Library. ISBN 0471303097. 
  • William P. Jencks (1987). Catalysis in Chemistry and Enzymology. Dover Publications. ISBN 0486654605. 

Spoljašnje veze

  • Hydroxymethylbilane+synthase на US National Library of Medicine Medical Subject Headings (MeSH)
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