Macromolecule Annotations for the Entities in PDB 1BIB

Protein Family Annotation Pfam Database Homepage

Chains Pfam Accession Pfam Identifier Pfam Description Type Source
A PF03099 BPL_LplA_LipB Biotin/lipoate A/B protein ligase family Domain This family includes biotin protein ligase, lipoate-protein ligase A and B. Biotin is covalently attached at the active site of certain enzymes that transfer carbon dioxide from bicarbonate to organic acids to form cellular metabolites. Biotin protein ligase (BPL) is the enzyme responsible for attaching biotin to a specific lysine at the active site of biotin enzymes. Each organism probably has only one BPL. Biotin attachment is a two step reaction that results in the formation of an amide linkage between the carboxyl group of biotin and the epsilon-amino group of the modified lysine [2]. Lipoate-protein ligase A (LPLA) catalyses the formation of an amide linkage between lipoic acid and a specific lysine residue in lipoate dependent enzymes [3]. The unusual biosynthesis pathway of lipoic acid is mechanistically intertwined with attachment of the cofactor [5]. PFAM PF03099
A PF08279 HTH_11 HTH domain Domain This family includes helix-turn-helix domains in a wide variety of proteins. PFAM PF08279
A PF02237 BPL_C Biotin protein ligase C terminal domain Domain The function of this structural domain is unknown. It is found to the C terminus of the biotin protein ligase catalytic domain Pfam:PF01317. PFAM PF02237

Protein Modification Annotation

Type PDB Residue Nr. Description