Identification and characterisation of a novel splice variant of synaptojanin1.
Synaptojanin1, the major constitutively active PtdInsP3 5-phosphatase activity in rat brain, is one of two closely related proteins both extensively spliced in their C-terminal proline rich domain. We describe here the discovery of a novel splice variant of synaptojanin1 which misses the major N-terminal part of the SAC1 domain. This deltaSAC-synaptojanin1 is expressed in rat brain tissue as shown by Northern and Western analysis. However, the deletion of the SAC1 domain does not alter PtdInsP3 5-phosphatase activity demonstrating that the SAC1 domain is not necessary for catalytic function.
Woscholski
R
R
Protein Phosphorylation Laboratory, Imperial Cancer Research Fund, London, UK.
Finan
P M
PM
Radley
E
E
Parker
P J
PJ
D017398:Alternative Splicing; D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D003001:Cloning, Molecular; D014644:Genetic Variation; D008969:Molecular Sequence Data; D009419:Nerve Tissue Proteins / Q000235:genetics*; D010744:Phosphoric Monoester Hydrolases / Q000235:genetics*; D051381:Rats; D017422:Sequence Analysis, DNA
D009419:Nerve Tissue Proteins; C097702:synaptojanin; D010744:Phosphoric Monoester Hydrolases