Peptidase family M28 (also called aminopeptidase Y family), uncharacterized subfamily. The M28 family contains aminopeptidases as well as carboxypeptidases. They have co-catalytic zinc ions; each zinc ion is tetrahedrally co-ordinated, with three amino acid ligands plus activated water; one aspartate residue binds both metal ions; High confidence in function and specificity.

Cysteine desulfurase activator complex subunit SufB; Provisional; High confidence in function and specificity.

Hypothetical protein.

ABC transporter; Biosynthesis of iron-sulfur clusters (Fe-S) depends on multi-protein systems. The SUF system of E. coli and Erwinia chrysanthemi is important for Fe-S biogenesis under stressful conditions. The SUF system is made of six proteins: SufC is an atypical cytoplasmic ABC-ATPase, which forms a complex with SufB and SufD; SufA plays the role of a scaffold protein for assembly of iron-sulfur clusters and delivery to target proteins; SufS is a cysteine desulfurase which mobilizes the sulfur atom from cysteine and provides it to the cluster; SufE has no associated function yet; H [...]

This protein, SufD, forms a cytosolic complex SufBCD. This complex enhances the cysteine desulfurase of SufSE. The system, together with SufA, is believed to act in iron-sulfur cluster formation during oxidative stress. SufB and SufD are homologous. Note that SufC belongs to the family of ABC transporter ATP binding proteins, so this protein, encoded by an adjacent gene, has often been annotated as a transporter component. [Biosynthesis of cofactors, prosthetic groups, and carriers, Other]; High confidence in function and specificity.

LD-Carboxypeptidase, a serine protease; LD-carboxypeptidase (Muramoyltetrapeptide carboxypeptidase; Merops family S66; initially described as Carboxypeptidase II) family also includes the microcin c7 self-immunity protein (MccF) as well as uncharacterized proteins including hypothetical proteins. LD-carboxypeptidase hydrolyzes the amide bond that links the dibasic amino acids to C-terminal D-amino acids. The physiological substrates of LD-carboxypeptidase are tetrapeptide fragments (such as UDP-MurNAc-tetrapeptides) that are produced when bacterial cell walls are degraded; they contain [...]

Potassium/proton antiporter; Reviewed; High confidence in function and specificity.

DNA gyrase subunit B; A type II topoisomerase that negatively supercoils closed circular double-stranded (ds) DNA in an ATP-dependent manner to modulate DNA topology and maintain chromosomes in an underwound state. Negative supercoiling favors strand separation, and DNA replication, transcription, recombination and repair, all of which involve strand separation. Also able to catalyze the interconversion of other topological isomers of dsDNA rings, including catenanes and knotted rings. Type II topoisomerases break and join 2 DNA strands simultaneously in an ATP-dependent manner.