UniProt:Q0DEC8 SS1

chain
  • transit peptide:1-113
  • chain:114-641
checksum EF851A03C7349076
comment
  • FUNCTION Involved in starch synthesis in endosperm amyloplasts (PubMed:16443699, PubMed:21417378, PubMed:21730357). Plays a role in the elongation of amylopectin chains (PubMed:16443699, PubMed:21417378, PubMed:21730357). Synthesizes preferentially amylopectin chains with a degree of polymerization (DP) of 7 to 11 by elongating chains with a DP of 4 to 7 (PubMed:16443699). Generates distincly chains with a DP of 8 to 12 chains from short chains with a DP of 6 to 7 (PubMed:16443699).CATALYTIC ACTIVITY [(1->4)-alpha-D-glucosyl](n) + ADP-alpha-D-glucose = [(1->4)-alpha-D-glucosyl](n+1) + ADP + H(+)PATHWAY Glycan biosynthesis; starch biosynthesis.SUBCELLULAR LOCATION Amyloplast or chloroplast, soluble.TISSUE SPECIFICITY Leaves and immature seeds.DISRUPTION PHENOTYPE Decrease in average length of amylopectin chains (PubMed:21417378). Reduced content of amylopectin chains with a degree of polymerization (DP) of 8 to 12, but increased content of chains with a DP of 6 to 7 and a DP of 16 to 19 (PubMed:16443699).MISCELLANEOUS Three forms of soluble starch synthase were purified: RSS1, RSS2 and RSS3.SIMILARITY Belongs to the glycosyltransferase 1 family. Bacterial/plant glycogen synthase subfamily.
created [InstanceEdit:1164949] Wu, Guanming, 2010-12-11
crossReference
databaseName UniProt
dbId 1160570
description
  • recommendedName: fullName evidence="9"Soluble starch synthase 1, chloroplastic/amyloplastic ecNumber evidence="9"2.4.1.21 alternativeName: fullName evidence="7"Starch synthase I
displayName UniProt:Q0DEC8 SS1
geneName
  • SS1
  • SSS1
  • Os06g0160700
  • LOC_Os06g06560
  • P0681F10.13
identifier Q0DEC8
isSequenceChanged false
keyword
  • Amyloplast
  • Chloroplast
  • Direct protein sequencing
  • Glycosyltransferase
  • Plastid
  • Reference proteome
  • Starch biosynthesis
  • Transferase
  • Transit peptide
modified [InstanceEdit:9852000] Weiser, Joel, 2023-11-03
name
  • SS1
referenceDatabase [ReferenceDatabase:2] UniProt
schemaClass ReferenceGeneProduct
secondaryIdentifier
  • SSY1_ORYSJ
  • B7F2B2
  • O24206
  • Q40739
  • Q5WA90
  • Q7Y044
sequenceLength 641
species [Species:1250427] Oryza sativa subsp. japonica
url http://purl.uniprot.org/uniprot/Q0DEC8