pfam10591: SPARC_Ca_bdg (this model, PSSM-Id:287550 is obsolete and has been replaced by 463162)
Secreted protein acidic and rich in cysteine Ca binding region
The SPARC_Ca_bdg domain of Secreted Protein Acidic and Rich in Cysteine is responsible for the anti-spreading activity of human urothelial cells. It is rich in alpha-helices. This extracellular calcium-binding domain contains two EF-hands that each coordinates one Ca2+ ion, forming a helix-loop-helix structure that not only drives the conformation of the protein but is also necessary for biological activity. The anti-spreading activity was dependent on the coordination of Ca2+ by a Glu residue at the Z position of EF-hand 2.
Jiyao W et al.(2023). "The conserved domain database in 2023.",