GLA

Domain containing Gla (gamma-carboxyglutamate) residues.
GLA
SMART accession number:SM00069
Description: A hyaluronan-binding domain found in proteins associated with the extracellular matrix, cell adhesion and cell migration.
Interpro abstract (IPR000294):

This domain contains post-translational modifications of many glutamate residues by vitamin K-dependent carboxylation to form gamma-carboxyglutamate (Gla) (PUBMED:3106112), (PUBMED:2183788). The GLA domain is responsible for the high-affinity binding of calcium ions. It starts at the N-terminal extremity of the mature form of proteins and ends with a conserved aromatic residue; a conserved Gla-x(3)-Gla-x-Cys motif (PUBMED:3317405) is found in the middle of the domain which seems to be important for substrate recognition by the carboxylase.

The 3D structure of the Gla domain has been solved (PUBMED:7713897), (PUBMED:8663165). Calcium ions induce conformational changes in the Gla domain and are necessary for the Gla domain to fold properly. A common structural feature of functional Gla domains is the clustering of N-terminal hydrophobic residues into a hydrophobic patch that mediates interaction with the cell surface membrane (PUBMED:8663165).

GO component:extracellular region (GO:0005576)
GO function:calcium ion binding (GO:0005509)
Family alignment:
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There are 454 GLA domains in 453 proteins in SMART's nrdb database.

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