Q1MQ97 · PSD_LAWIP

Function

function

Catalyzes the formation of phosphatidylethanolamine (PtdEtn) from phosphatidylserine (PtdSer).

Catalytic activity

Cofactor

pyruvate (UniProtKB | Rhea| CHEBI:15361 )

Note: Binds 1 pyruvoyl group covalently per subunit.

Pathway

Phospholipid metabolism; phosphatidylethanolamine biosynthesis; phosphatidylethanolamine from CDP-diacylglycerol: step 2/2.

Features

Showing features for site, active site.

TypeIDPosition(s)Description
Site181-182Cleavage (non-hydrolytic); by autocatalysis
Active site182Schiff-base intermediate with substrate; via pyruvic acid

GO annotations

AspectTerm
Cellular Componentplasma membrane
Molecular Functionphosphatidylserine decarboxylase activity
Biological Processphosphatidylethanolamine biosynthetic process

Keywords

Enzyme and pathway databases

Names & Taxonomy

Protein names

Gene names

    • Name
      psd
    • Ordered locus names
      LI0776

Organism names

Accessions

  • Primary accession
    Q1MQ97

Proteomes

Subcellular Location

Cell membrane
; Peripheral membrane protein

Keywords

PTM/Processing

Features

Showing features for chain, modified residue.

TypeIDPosition(s)Description
ChainPRO_00002622231-181Phosphatidylserine decarboxylase beta chain
Modified residue182Pyruvic acid (Ser); by autocatalysis
ChainPRO_0000262224182-215Phosphatidylserine decarboxylase alpha chain

Post-translational modification

Is synthesized initially as an inactive proenzyme. Formation of the active enzyme involves a self-maturation process in which the active site pyruvoyl group is generated from an internal serine residue via an autocatalytic post-translational modification. Two non-identical subunits are generated from the proenzyme in this reaction, and the pyruvate is formed at the N-terminus of the alpha chain, which is derived from the carboxyl end of the proenzyme. The post-translation cleavage follows an unusual pathway, termed non-hydrolytic serinolysis, in which the side chain hydroxyl group of the serine supplies its oxygen atom to form the C-terminus of the beta chain, while the remainder of the serine residue undergoes an oxidative deamination to produce ammonia and the pyruvoyl prosthetic group on the alpha chain.

Keywords

Interaction

Subunit

Heterodimer of a large membrane-associated beta subunit and a small pyruvoyl-containing alpha subunit.

Protein-protein interaction databases

Family & Domains

Sequence similarities

Belongs to the phosphatidylserine decarboxylase family. PSD-A subfamily.

Phylogenomic databases

Family and domain databases

Sequence

  • Sequence status
    Complete
  • Length
    215
  • Mass (Da)
    24,071
  • Last updated
    2006-11-28 v2
  • Checksum
    FFB95E20F6FFF501
MGKTNLGIDQEGFPYIAIFAFSSLIFAILGWWLLAVLCLIGTIFCGHFFRDPERIIPTEANIAVSPADGKIIRIEPRQDPISGESHTCISIFMNICNVHVNRSPIKGQIEAIQYVQGHFLNASLDKAAKENEHCSYLLRDQDGKQWVVVQIAGLIARRIVCRTKEGDILNRGERFGIIRFGSRVDLYLPEEYTPTVNLGNKVIAGETILAKKNQE

Sequence caution

The sequence CAJ54830.1 differs from that shown. Reason: Erroneous initiation

Keywords

Sequence databases

Nucleotide SequenceProtein SequenceMolecule TypeStatus
AM180252
EMBL· GenBank· DDBJ
CAJ54830.1
EMBL· GenBank· DDBJ
Genomic DNA Different initiation

Genome annotation databases

Similar Proteins

Disclaimer

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