Protein Information

Name myeloperoxidase
Synonyms 38 kDa MYELOPEROXIDASE; MPO; Myeloperoxidase; Myeloperoxidase precursor; Peroxidase (Myeloperoxidase); Myeloperoxidases; Myeloperoxidase precursors; Peroxidase (Myeloperoxidase)s

Compound Information

Name hydrogen cyanide
CAS hydrocyanic acid

Reference List

PubMed Abstract RScore(About this table)
18521543 Graham GG, Whitehouse MW, Bushell GR: Aurocyanide, dicyano-aurate (I), a pharmacologically active metabolite of medicinal gold complexes. Inflammopharmacology. 2008 Jun;16(3):126-32.

Au (CN) (2) (-) is generated from the therapeutic gold complexes by small amounts of hydrogen cyanide, HCN, produced from thiocyanate, SCN (-), by myeloperoxidase (MPO) an enzyme in neutrophils which normally produces hypochlorite, OCl (-).
31(0,1,1,1) Details
36154 Zgiczynski JM, Stelmaszynska T: Hydrogen cyanide and cyanogen chloride formation by the myeloperoxidase-H2O2-Cl- system. Biochim Biophys Acta. 1979 Apr 12;567(2):309-14.
12(0,0,1,7) Details
9744567 Graham GG, Kettle AJ: The activation of gold complexes by cyanide produced by polymorphonuclear leukocytes. Biochem Pharmacol. 1998 Aug 1;56(3):307-12.

When the hypothiocyanite decays to hydrogen cyanide, the pro-drug is converted to aurocyanide which then suppresses further oxidant production by these inflammatory cells.
The formation of aurocyanide by myeloperoxidase..
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2989021 Stelmaszynska T: Formation of HCN by human phagocytosing neutrophils--1. Int J Biochem. 1985;17(3):373-9.


One of the substrates yielding HCN during phagocytosis are N-dichloroglycyl residues of bacterial peptidoglycan formed by the chlorinating myeloperoxidase-H2O2-Cl- system of neutrophils.
1(0,0,0,1) Details
14642392 Klein I, Nagler RM, Toffler R, van Der Vliet A, Reznick AZ: Effect of cigarette smoke on oral peroxidase activity in human saliva: role of hydrogen cyanide. Free Radic Biol Med. 2003 Dec 1;35(11):1448-52.

Peroxidase activity in human saliva is composed of salivary peroxidase (80%), of salivary glandular origin, and myeloperoxidase (20%), of leukocyte origin.
1(0,0,0,1) Details
215410 Stelmaszynska T, Zgliczynski JM: N-(2-Oxoacyl) amino acids and nitriles as final products of dipeptide chlorination mediated by the myeloperoxidase/H2O2/Cl- system. Eur J Biochem. 1978 Dec 1;92(1):301-8.

N-Dichloroglycyl-amino acid decomposes through a relatively stable intermediate (cyano-formylamino acid) to hydrogen cyanide, cyanogen chloride and the free C-terminal amino acid.
1(0,0,0,1) Details