Putative integral membrane protein - Q9XA14 (Q9XA14_STRCO)


Protein Feature View of PDB entries mapped to a UniProtKB sequence  

  • Number of PDB entries for Q9XA14: 1
Transpeptidase that anchors surface proteins to the cell wall. Recognizes both Leu-Ala-x-Thr-Gly and Leu-Pro-x-Thr-Gly, with a preference for the former. Unlike the S.aureus sortase it cleaves not only the Thr-Gly motif but also the Ala-X bond; Ala-Glu and Ala-His bonds are better substrates than the Thr-Gly motif in vitro (PubMed:22296345, PubMed:27936128). Among its possible substrates are the chaplins ChpA, ChpB and ChpC; this enzyme is less important for ChpC attachment than is SrtE2. A double knockout mutant of srtE1 and srtE2 shows a developmental defect in aerial hyphae formation more dramatic than that due to chaplin deletion (PubMed:22296345). UniProt
Catalytic Activity
The enzyme catalyzes a cell wall sorting reaction in which a surface protein with a sorting signal containing a LPXTG motif is cleaved between the Thr and Gly residue. The resulting threonine carboxyl end of the protein is covalently attached to a pentaglycine cross-bridge of peptidoglycan. UniProt
Pathway Maps
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The probably cytoplasmic N-terminus cannot be deleted without destabilizing the protein. UniProt
  • Other Gene names: SCO3850
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Data in lilac represent the genomic exon structure projected onto the UniProt sequence.
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The PDB to UniProt mapping is based on the data provided by the EBI SIFTS project. See also Velankar et al., Nucleic Acids Research 33, D262-265 (2005).
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