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Q9JTX0 · ISCS_NEIMA

Function

function

Master enzyme that delivers sulfur to a number of partners involved in Fe-S cluster assembly, tRNA modification or cofactor biosynthesis. Catalyzes the removal of elemental sulfur atoms from cysteine to produce alanine. Functions as a sulfur delivery protein for Fe-S cluster synthesis onto IscU, an Fe-S scaffold assembly protein, as well as other S acceptor proteins.

Catalytic activity

Cofactor

pyridoxal 5'-phosphate (UniProtKB | Rhea| CHEBI:597326 )

Pathway

Cofactor biosynthesis; iron-sulfur cluster biosynthesis.

Features

Showing features for binding site, active site.

Type
IDPosition(s)Description
Binding site75-76pyridoxal 5'-phosphate (UniProtKB | ChEBI)
Binding site155pyridoxal 5'-phosphate (UniProtKB | ChEBI)
Binding site183pyridoxal 5'-phosphate (UniProtKB | ChEBI)
Binding site203-205pyridoxal 5'-phosphate (UniProtKB | ChEBI)
Binding site243pyridoxal 5'-phosphate (UniProtKB | ChEBI)
Active site328Cysteine persulfide intermediate
Binding site328[2Fe-2S] cluster (UniProtKB | ChEBI); ligand shared with IscU; via persulfide group

GO annotations

AspectTerm
Cellular Componentcytoplasm
Molecular Function2 iron, 2 sulfur cluster binding
Molecular Functioncysteine desulfurase activity
Molecular Functionmetal ion binding
Molecular Functionpyridoxal phosphate binding
Biological Process[2Fe-2S] cluster assembly

Keywords

Enzyme and pathway databases

Names & Taxonomy

Protein names

  • Recommended name
    Cysteine desulfurase IscS
  • EC number

Gene names

    • Name
      iscS
    • Ordered locus names
      NMA1594

Organism names

Accessions

  • Primary accession
    Q9JTX0
  • Secondary accessions
    • A1ISI0

Proteomes

Subcellular Location

Keywords

PTM/Processing

Features

Showing features for chain, modified residue.

Type
IDPosition(s)Description
ChainPRO_00001502711-404Cysteine desulfurase IscS
Modified residue206N6-(pyridoxal phosphate)lysine

Interaction

Subunit

Homodimer. Forms a heterotetramer with IscU, interacts with other sulfur acceptors.

Structure

Family & Domains

Sequence similarities

Phylogenomic databases

Family and domain databases

Sequence

  • Sequence status
    Complete
  • Length
    404
  • Mass (Da)
    44,742
  • Last updated
    2000-10-01 v1
  • MD5 Checksum
    D48EC41B614784AF26DBDDB0C5BE03F8
MTVKTPVYLDYAATTTVDKRVAEKMIPYLTETFGNPASNSHAFGWEAEEAVEKARADIAALINADPKEIVFTSGATESDNLAIKGAANFYKTKGKHLITVKTEHKAVLDTMRELERQGFEVTYLGVQENGLIDLEELKAAIRDDTILVSVMWANNEIGVVQDIPAIGEICRERKIVFHVDAAQACGKVPVDVEAAKIDLLSMSAHKVYGPKGIGALYVRRKPRVRLEAQMHGGGHERGFRSGTLPTHQIVGMGEAFRIAKEELEQDMAHYRKLRDIFLKGIEGIEEVYINGDLEHRVPNNLNVSFNFVEGESLIMAVKELAVSSGSACTSASLEPSYVLRALGRNDELAHSSLRITFGRMTTEEEVQFAAELIKSKIGKLRELSPLWEMFKDGIDLNSIEWAAH

Sequence databases

Nucleotide SequenceProtein SequenceMolecule TypeStatus
AL157959
EMBL· GenBank· DDBJ
CAM08737.1
EMBL· GenBank· DDBJ
Genomic DNA

Genome annotation databases

Similar Proteins

Disclaimer

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