Macromolecule Annotations for the Entities in PDB 1PJT

Domain Annotation: SCOP Classification SCOP Database (version: 1.75) Homepage

Protein Family Annotation Pfam Database Homepage

Chains Pfam Accession Pfam Identifier Pfam Description Type Source
A PF14824 Sirohm_synth_M Sirohaem biosynthesis protein central Domain This is the central domain of a multifunctional enzyme which catalyses the biosynthesis of sirohaem. Both of the catalytic activities of this enzyme (precorrin-2 dehydrogenase EC: and sirohydrochlorin ferrochelatase (EC: are located in the N-terminal domain of this enzyme, Pfam:PF13241 [1]. PFAM PF14824
A PF13241 NAD_binding_7 Putative NAD(P)-binding Domain This domain is found in fungi, plants, archaea and bacteria. PFAM PF13241
A PF00590 TP_methylase Tetrapyrrole (Corrin/Porphyrin) Methylases Domain This family uses S-AdoMet in the methylation of diverse substrates. This family includes a related group of bacterial proteins of unknown function, including Swiss:P45528. This family includes the methylase Dipthine synthase. PFAM PF00590
A PF10414 CysG_dimeriser Sirohaem synthase dimerisation region Domain Bacterial sulfur metabolism depends on the iron-containing porphinoid sirohaem. CysG, S-adenosyl-L-methionine (SAM)-dependent bis-methyltransferase, dehydrogenase and ferrochelatase, synthesises sirohaem from uroporphyrinogen III via reactions which encompass two branchpoint intermediates in tetrapyrrole biosynthesis, diverting flux first from protoporphyrin IX biosynthesis and then from cobalamin (vitamin B12) biosynthesis. CysG is a dimer of two structurally similar protomers held together asymmetrically through a number of salt-bridges across complementary residues in the CysG_dimeriser region to produce a series of active sites, accounting for CysG's multifunctionality, catalysing four diverse reactions: two SAM-dependent methylations, NAD+-dependent tetrapyrrole dehydrogenation and metal chelation. The CysG_dimeriser region holding the two protomers together is of 74 residues [1]. PFAM PF10414

Protein Modification Annotation

Type PDB Residue Nr. Description