A0A0H3MR81 · A0A0H3MR81_MYCLB

Function

function

Removes the N-terminal methionine from nascent proteins. The N-terminal methionine is often cleaved when the second residue in the primary sequence is small and uncharged (Met-Ala-, Cys, Gly, Pro, Ser, Thr, or Val). Requires deformylation of the N(alpha)-formylated initiator methionine before it can be hydrolyzed.

Catalytic activity

  • Release of N-terminal amino acids, preferentially methionine, from peptides and arylamides.
    EC:3.4.11.18 (UniProtKB | ENZYME | Rhea)

Cofactor

Co2+ (UniProtKB | Rhea| CHEBI:48828 )

Zn2+ (UniProtKB | Rhea| CHEBI:29105 )

Mn2+ (UniProtKB | Rhea| CHEBI:29035 )

Fe2+ (UniProtKB | Rhea| CHEBI:29033 )

Note: Binds 2 divalent metal cations per subunit. Has a high-affinity and a low affinity metal-binding site. The true nature of the physiological cofactor is under debate. The enzyme is active with cobalt, zinc, manganese or divalent iron ions. Most likely, methionine aminopeptidases function as mononuclear Fe2+-metalloproteases under physiological conditions, and the catalytically relevant metal-binding site has been assigned to the histidine-containing high-affinity site.

Features

Showing features for binding site.

TypeIDPosition(s)Description
Binding site88substrate
Binding site106a divalent metal cation 1 (UniProtKB | ChEBI)
Binding site117a divalent metal cation 2 (UniProtKB | ChEBI); catalytic
Binding site117a divalent metal cation 1 (UniProtKB | ChEBI)
Binding site186a divalent metal cation 2 (UniProtKB | ChEBI); catalytic
Binding site193substrate
Binding site219a divalent metal cation 2 (UniProtKB | ChEBI); catalytic
Binding site250a divalent metal cation 2 (UniProtKB | ChEBI); catalytic
Binding site250a divalent metal cation 1 (UniProtKB | ChEBI)

GO annotations

AspectTerm
Cellular Componentcytosol
Molecular Functioninitiator methionyl aminopeptidase activity
Molecular Functionmetalloaminopeptidase activity
Molecular Functiontransition metal ion binding
Biological Processproteolysis

Keywords

Enzyme and pathway databases

Names & Taxonomy

Protein names

  • Recommended name
    Methionine aminopeptidase
  • EC number
  • Short names
    MAP
    ; MetAP
  • Alternative names
    • Peptidase M

Gene names

    • Name
      mapA
    • Synonyms
      map
    • Ordered locus names
      MLBr01831

Organism names

Accessions

  • Primary accession
    A0A0H3MR81

Proteomes

Subcellular Location

Interaction

Subunit

Monomer.

Family & Domains

Features

Showing features for domain.

TypeIDPosition(s)Description
Domain23-257Peptidase M24

Sequence similarities

Phylogenomic databases

Family and domain databases

Sequence

  • Sequence status
    Complete
  • Length
    266
  • Mass (Da)
    27,738
  • Last updated
    2015-09-16 v1
  • Checksum
    50EE74D0BFAA80DB
MGALTRLRSRRVVPQRSVGELDAMAAAGAVVAAALHAVRDAAGPGVSSLSLDEIAESVIREAGATPSFLRYHGYPATICTSVNDRVIHGIPSAVEILAPGDLVSIDCGAVLDGWHGDAAITFGVGTLTSVDEALSQATRESLEAGIAAMIVNNRLTDVAHAIEVSTRTSEIRYRLTFGIVQGYGGHGIGRHMHMDPFLPNEGAPGRGPLLVPGSVLAIEPMLTLGTGKTIVLDDEWTVTTADGSRAAHWEHTVAVTEDGPRVLTLA

Sequence databases

Nucleotide SequenceProtein SequenceMolecule TypeStatus
FM211192
EMBL· GenBank· DDBJ
CAR71927.1
EMBL· GenBank· DDBJ
Genomic DNA

Genome annotation databases

Similar Proteins

Disclaimer

Any medical or genetic information present in this entry is provided for research, educational and informational purposes only. It is not in any way intended to be used as a substitute for professional medical advice, diagnosis, treatment or care. Our staff consists of biologists and biochemists that are not trained to give medical advice.
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