Results 131 to 140 of about 2,195 (151)
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Computational modeling of the catalytic mechanism of hydroxymethylbilane synthase

Physical Chemistry Chemical Physics, 2019
Hydroxymethylbilane synthase (HMBS), the third enzyme in the heme biosynthesis pathway, catalyzes the formation of 1-hydroxymethylbilane (HMB) by a stepwise polymerization of four molecules of porphobilinogen (PBG) using the dipyrromethane (DPM) cofactor.
Navneet Bung   +3 more
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Time-resolved and static-ensemble structural chemistry of hydroxymethylbilane synthase

Faraday Discuss., 2003
The enzyme hydroxymethylbilane synthase (HMBS, EC 4.3.1.8), 313 amino acid residues and MW 34 kDa, also known as porphobilinogen deaminase (PBGD), catalyses the stepwise polymerization of four molecules of porphobilinogen (PBG) to the linear tetrapyrrole 1-hydroxymethylbilane. Several crystallographic structures of HMBS have been previously determined,
John R, Helliwell   +7 more
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Acute Intermittent Porphyria: Heterogeneity of Mutations in the Hydroxymethylbilane Synthase Gene in Italy

Blood Cells, Molecules, and Diseases, 2001
Acute intermittent porphyria (AIP) is an autosomal disorder caused by molecular abnormalities in the gene coding for hydroxymethylbilane synthase (HMBS), the third enzyme in the heme biosynthetic pathway. So far, more than 170 different mutations responsible for AIP have been identified worldwide in the HMBS gene.
F. Martinez di Montemuros   +7 more
openaire   +4 more sources

13C-N.M.R. Studies on the pyrromethane cofactor of hydroxymethylbilane synthase

Tetrahedron Letters, 1988
By growing Escherichiacoli in the presence of 5-amino [5-13C] laevulinic acid, the enzyme hydroxymethylbilane synthase is produced carrying 13C-labels in its pyrromethane cofactor. It is then proved by 13C-n.m.r. spectroscopy that the cofactor is bound to the protein via the sulphur atom of a cysteine residue.
Uwe Beifuss   +3 more
openaire   +1 more source

19-Bromo-1-hydroxymethylbilane a novel inhibitor of Uro'gen III synthase

Bioorganic & Medicinal Chemistry, 1994
A novel hydroxymethylbilane analog, 19-Br-HMB (11), has been synthesized. Its activity with the enzyme Uro'gen III synthase shows competitive inhibition.
C, Pichon   +4 more
openaire   +2 more sources

Erythrocyte Hydroxymethylbilane Synthase Activity in a Chinese Family with Acute Intermittent Porphyria

Annals of Clinical Biochemistry: International Journal of Laboratory Medicine, 1988
Etude d'une famille chinoise avec analyse de l'activite enzymatique de l'uroporphyrinogen I synthase erythrocytaire et du porphobilinogen ...
F Y, Lee   +5 more
openaire   +2 more sources

Comparative inhibition of hepatic hydroxymethylbilane synthase by both hard and soft metal cations

Canadian Journal of Biochemistry and Cell Biology, 1984
The in vitro inhibition of hydroxymethylbilane synthase (EC 4.3.1.8, uroporphyrinogen I synthetase) obtained from livers of Sprague–Dawley rats has been studied with a wide range of di- and tri-valent metal ions. After purification by cell lysis, heat treatment, and centrifugation, the stable, soluble enzyme yielded sigmoidal inhibition curves with ...
D J, Farmer, B R, Hollebone
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A new synthesis of porphobilinogen analogues, inhibitors of hydroxymethylbilane synthase.

Organic & biomolecular chemistry, 2004
Two analogues of porphobilinogen, the 6-methyl and 6,11-ethano derivatives, have been made by a new synthetic route and the 6-methyl analogue has proved to be the most potent inhibitor of hydroxymethylbilane synthase yet reported (Ki = 3 microM).
Raef, Ahmed, Finian J, Leeper
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Purification of hydroxymethylbilane synthase from human erythrocytes

Biochemical Society Transactions, 1985
RICHARD C. BROWN   +2 more
openaire   +1 more source

Hydroxymethylbilane Synthase Deficiency

2009
Dieter Metze   +199 more
openaire   +1 more source

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