UniProt:Q67WN8 SPS3

chain
  • chain:1-977
checksum 6D6C96A32E37E814
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 Esoxpressed in source leaves and sink leaves.INDUCTION Circadian-regulated, with the highest expression 3 hours after the beginning of light period (in 14 hours light/10 hours dark cycle).SIMILARITY Belongs to the glycosyltransferase 1 family.
created [InstanceEdit:1164949] Wu, Guanming, 2010-12-11
crossReference
databaseName UniProt
dbId 1159620
description
  • recommendedName: Probable sucrose-phosphate synthase 3 ecNumber: 2.4.1.14 alternativeName: Sucrose phosphate synthase 3F shortName: OsSPS3F alternativeName: UDP-glucose-fructose-phosphate glucosyltransferase
displayName UniProt:Q67WN8 SPS3
geneName
  • SPS3
  • SPS6
  • Os06g0643800
  • LOC_Os06g43630
  • P0017B12.4
  • P0416A11.37
identifier Q67WN8
isSequenceChanged false
keyword
  • Glycosyltransferase
  • Reference proteome
  • Transferase
modified [InstanceEdit:9939033] Weiser, Joel, 2025-02-21
name
  • SPS3
referenceDatabase [ReferenceDatabase:2] UniProt
schemaClass ReferenceGeneProduct
secondaryIdentifier
  • SPSA3_ORYSJ
  • Q0DAM8
sequenceLength 977
species [Species:1250427] Oryza sativa subsp. japonica
url http://purl.uniprot.org/uniprot/Q67WN8