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:

2024-08-14

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

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