Protein Family Models

This is a family of glycine cleavage H-proteins, part of the glycine cleavage multienzyme complex (GCV) found in bacteria and the mitochondria of eukaryotes. GCV catalyses the catabolism of glycine in eukaryotes. A lipoyl group is attached to a completely conserved lysine residue. The H protein shuttles the methylamine group of glycine from the P protein to the T protein. [1]. 8197146. X-ray structure determination at 2.6-A resolution of a lipoate- containing protein: the H-protein of the glycine decarboxylase complex from pea leaves. Pares S, Cohen-Addad C, Sieker L, Neuburger M, Douce R;. Proc Natl Acad Sci U S A 1994;91:4850-4853. (from Pfam)

Date:

2024-10-16

This family covers two Prosite entries, the conserved lysine residue binds biotin in one group and lipoic acid in the other. Note that the HMM does not currently recognise the Glycine cleavage system H proteins. (from Pfam)

Date:

2024-08-14

Part of multienzyme complex composed of H, L, P, and T proteins which catalyzes oxidation of glycine to yield carbon dioxide, ammonia, 5,10-CH2-H4folate and a reduced pyridine nucleotide; protein H is involved in transfer of methylamine group from the P to T protein; covalently bound to a lipoyl cofactor

Gene:

gcvH

Date:

2020-10-26

glycine cleavage system protein H plays a role in the degradation of glycine by shuttling the methylamine group of glycine from P-protein (glycine dehydrogenase) to the T-protein (aminomethyltransferase).

Date:

2024-06-12

This model represents the glycine cleavage system H protein, which shuttles the methylamine group of glycine from the P protein to the T protein. The mature protein is about 130 residues long and contains a lipoyl group covalently bound to a conserved Lys residue. The genome of Aquifex aeolicus contains one protein scoring above the trusted cutoff and clustering with other bacterial H proteins, and four more proteins clustering together and scoring below the trusted cutoff; it seems doubtful that all of these homologs are authentic H protein. The Chlamydial homolog of H protein is nearly as divergent as the Aquifex outgroup, is not accompanied by P and T proteins, is not included in the seed alignment, and consequently also scores below the trusted cutoff.

Gene:

gcvH

Date:

2024-05-29