Family

Lantibiotic leader peptide-processing serine protease (IPR008357)

Short name: Lanit_process

Overlapping homologous superfamilies

Family relationships

Description

Lantibiotic genes reside on the bacterial chromosome, where they cluster with genes that adapt and secrete them to the extracellular space. Many of these so-called 'pathogenicity islands' have been characterised, including the epidermin (epi) cluster in Staphylococcus epidermis, and the nisin (nis) cluster in Lactococcus lactis [PMID: 11133423]. The gene encoding the lantibiotic is flanked by 3 regulatory genes: 2 that are usually involved in a 2-component regulatory system, and another that cleaves the signal peptide from the precursor to produce the mature lantibiotic.

This protein (usually designated with a "P" suffix - nisP, mutP, etc.) is highly conserved amongst pathogenic species, and is essential for virulence and survival of the bacterium against competitors in the host [PMID: 11133423]. A novel pathogenicity island in resistant Enterococcus faecalis has been sequenced. In addition to the lantibiotic Cyl gene cluster, this revealed a novel set of virulence factors involved in vancomycin resistance and pathogenicity [PMID: 12066186].

Lantiobiotic (lanthionine-containing antibiotics) specific proteases are serine proteases in the subtilisin family (family S8). The proteases that cleave the N-terminal leader peptides from lantiobiotics include: epiP, nsuP, mutP, and nisP. EpiP (MEROPS identifier S08.060), from Staphylococcus, is thought to cleave matured epidermin [PMID: 8550430]. NsuP, a dehydratase from Streptococcus and NisP (MEROPS identifier S08.059), a membrane-anchored protease from Lactococcus, cleaves nisin [PMID: 8478324]. MutP (MEROPS identifier S08.065) is highly similar to epiP and nisP and is thought to process the prepeptide mutacin III of S. mutans [PMID: 10473390].

GO terms

Biological Process

GO:0006508 proteolysis

Molecular Function

GO:0004252 serine-type endopeptidase activity

Cellular Component

No terms assigned in this category.

Contributing signatures

Signatures from InterPro member databases are used to construct an entry.
PRINTS
PIRSF
CDD
  • cd07482 (Peptidases_S8_Lantibiotic_spec)