UniProt:B7F7B9 SPS2

chain
  • chain:1-963
checksum 610BC79E8459A805
comment
  • FUNCTION Plays a role in photosynthetic sucrose synthesis by catalyzing the rate-limiting step of sucrose biosynthesis from UDP-glucose and fructose- 6-phosphate. Involved in the regulation of carbon partitioning in the leaves of plants. May regulate the synthesis of sucrose and therefore play a major role as a limiting factor in the export of photoassimilates out of the leaf. Plays a role for sucrose availability that is essential for plant growth and fiber elongation (By similarity).CATALYTIC ACTIVITY beta-D-fructose 6-phosphate + UDP-alpha-D-glucose = sucrose 6(F)-phosphate + UDP + H(+)ACTIVITY REGULATION Activity is regulated by phosphorylation and moderated by concentration of metabolites and light.PATHWAY Glycan biosynthesis; sucrose biosynthesis; sucrose from D-fructose 6-phosphate and UDP-alpha-D-glucose: step 1/2.SUBUNIT Homodimer or homotetramer.TISSUE SPECIFICITY Expressed in germinating seeds.DEVELOPMENTAL STAGE Expressed in source leaves and sink leaves.INDUCTION Circadian-regulated, with the highest expression 1 hour after the beginning of dark period (in 14 hours light/10 hours dark cycle).SIMILARITY Belongs to the glycosyltransferase 1 family.SEQUENCE CAUTION Extended N-terminus.SEQUENCE CAUTION Extended N-terminus.
created [InstanceEdit:1164949] Wu, Guanming, 2010-12-11
crossReference
databaseName UniProt
dbId 1157178
description
  • recommendedName: Probable sucrose-phosphate synthase 2 ecNumber: 2.4.1.14 alternativeName: Sucrose phosphate synthase 2F shortName: OsSPS2F alternativeName: UDP-glucose-fructose-phosphate glucosyltransferase
displayName UniProt:B7F7B9 SPS2
geneName
  • SPS2
  • Os02g0184400
  • LOC_Os02g09170
  • OJ1572_F02.13
  • OsJ_05652
identifier B7F7B9
isSequenceChanged false
keyword
  • Glycosyltransferase
  • Reference proteome
  • Transferase
modified [InstanceEdit:9939033] Weiser, Joel, 2025-02-21
name
  • SPS2
referenceDatabase [ReferenceDatabase:2] UniProt
schemaClass ReferenceGeneProduct
secondaryIdentifier
  • SPSA2_ORYSJ
  • A0A0P0VFM9
  • Q6H881
sequenceLength 963
species [Species:1250427] Oryza sativa subsp. japonica
url http://purl.uniprot.org/uniprot/B7F7B9