The Peptide Transporter Carbon Starvation (CstA) Family (TC# 2.A.114) is a member of the APC superfamily and consists of proteins from bacteria and archaea.
This protein is encoded by a carbon starvation inducible gene, cstA, that is under cyclic AMP-CRP control.
[1] A Campylobacter jejuni homologue has been shown to transport di- and tripeptides (see TC# 2.A.114.1.5).
[2][3] Proteins currently known to belong to the CstA family are listed in the Transporter Classification Database.
As of early 2016, there is no crystal structural data available for members of the CstA family on RCSB.