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- ****************************
- * Calsequestrin signatures *
- ****************************
-
- Calsequestrin is a moderate-affinity, high-capacity calcium-binding protein
- of cardiac and skeletal muscle [1], where it is located in the lumenal space
- of the sarcoplasmic reticulum terminal cisternae. Calsequestrin acts as a
- calcium buffer and plays an important role in the muscle excitation-
- contraction coupling. It is a highly acidic protein of about 400 amino acid
- residues that binds more than 40 moles of calcium per mole of protein. There
- are at least two different forms of calsequestrin: one which is expressed in
- cardiac muscles and another in skeletal muscles. Both forms have highly
- similar sequences.
-
- We have developed two signature sequences, the first one corresponds to the N-
- terminus of the mature protein; the second is located just in front of the
- C-terminus of the protein which is composed of a highly acidic tail of
- variable length.
-
- -Consensus pattern: [EQ]-[DE]-G-L-[DN]-F-P-x-Y-D-G-x-D-R-V
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: NONE.
-
- -Consensus pattern: [DE]-L-E-D-W-[LIVM]-E-D-V-L-x-G-x-[LIVM]-N-T-E-D-D-D
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: NONE.
-
- -Last update: October 1993 / First entry.
-
- [ 1] Treves S., Vilsen B., Chiozzi P., Andersen J.P., Zorzato F.
- Biochem. J. 283:767-772(1992).
-