UniProt:A0A0P0XCU3 SSIIIA

chain
  • transit peptide:1-49
  • chain:50-1875
checksum 07E6DBD2B16A23F0
comment
  • FUNCTION Involved in starch synthesis in endosperm amyloplasts (PubMed:17297616, PubMed:17586688, PubMed:21417378, PubMed:21595523, PubMed:21730357). Plays an important role in the elongation of amylopectin B chains (PubMed:17297616, PubMed:17586688, PubMed:21417378, PubMed:21595523, PubMed:21730357).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.ALTERNATIVE PRODUCTS Expressed in the endosperm.DEVELOPMENTAL STAGE Expressed in developing caryopsis from 5 to 15 days after flowering.DISRUPTION PHENOTYPE White-core floury endosperm (PubMed:17297616, PubMed:27791174). Increased content of resistant starch (RS) (PubMed:27791174). Endosperm containing increased levels of amylose (PubMed:17297616, PubMed:21417378). Reduced content of long amylopectin chains with a degree of polymerization (DP) of 30 or greater (PubMed:17297616, PubMed:17586688). Reduced content of amylopectin chains with a DP of 6 to 8 and a DP of 16 to 20, but increased content of chains with a DP of 9 to 15 and a DP of 22 to 29 (PubMed:17297616, PubMed:17586688). Decrease in average length of amylopectin chains (PubMed:21417378).BIOTECHNOLOGY Selection of varieties with reduced SSIIIA activity may be a tool to increase resistant starch (RS) content of rice grain.SIMILARITY Belongs to the glycosyltransferase 1 family. Bacterial/plant glycogen synthase subfamily.
created [InstanceEdit:9918269] Naithani, Sushma, 2024-08-14
databaseName UniProt
dbId 9918271
description
  • recommendedName: fullName evidence="13"Soluble starch synthase 3a, chloroplastic/amyloplastic ecNumber evidence="13"2.4.1.21 alternativeName: fullName evidence="12"Protein FLOURY ENDOSPERM 5 alternativeName: fullName evidence="12"Soluble starch synthase IIIa shortName evidence="12"OsSSIIIa
displayName UniProt:A0A0P0XCU3 SSIIIA
geneName
  • SSIIIA
  • FLO5
  • SS3A
  • SSIII-2
  • Os08g0191433
  • LOC_Os08g09230
  • OSJNBa0056O06.4-1
identifier A0A0P0XCU3
isSequenceChanged false
keyword
  • Alternative splicing
  • Amyloplast
  • Chloroplast
  • Coiled coil
  • Glycosyltransferase
  • Plastid
  • Reference proteome
  • Starch biosynthesis
  • Transferase
  • Transit peptide
modified [InstanceEdit:9926675] Weiser, Joel, 2024-11-03
name
  • SSIIIA
referenceDatabase [ReferenceDatabase:2] UniProt
schemaClass ReferenceGeneProduct
secondaryIdentifier
  • SSY3A_ORYSJ
  • Q6Z1D6
sequenceLength 1875
species [Species:1250427] Oryza sativa subsp. japonica
url http://purl.uniprot.org/uniprot/A0A0P0XCU3