NCBI Accession #
NP_191311.1
NCBI GenBank Nucleotide #
NM_115612.3
NCBI Official Full Name
seed imbibition 2
NCBI Official Symbol
SIP2
NCBI Official Synonym Symbols
AtSIP2; raffinose synthase 2; RS2; seed imbibition 2
NCBI Protein Information
seed imbibition 2
NCBI Summary
SIP2 encodes a raffinose-specific alpha-galactosidase that catalyzes the breakdown of raffinose into alpha-galatose and sucrose. This enzyme may function in unloading raffinose from the phloem as part of sink metabolism. Although it was originally predicted to act as a raffinose synthase (RS), that activity was not observed for recombinant SIP2.
UniProt Synonym Gene Names
RS2; SIP2
UniProt Protein Name
Probable galactinol--sucrose galactosyltransferase 2
UniProt Synonym Protein Names
Protein SEED IMBIBITION 2; Raffinose synthase 2
UniProt Primary Accession #
Q94A08
UniProt Secondary Accession #
Q0WWI0; Q3EAI2; Q3EAI3; Q9SCM1
UniProt Related Accession #
Q94A08
UniProt Comments
Transglycosidase operating by a ping-pong reaction mechanism. Involved in the synthesis of raffinose, a major soluble carbohydrate in seeds, roots and tubers .