Protein: Granule-bound starch synthase 1, chloroplastic/amyloplastic (AtGBS1) (AtGBSS1) (EC 2.4.1.242) (Granule-bound starch synthase I) (GBSS-I) (Q9MAQ0)
Organism: Arabidopsis thaliana (Mouse-ear cress)
Function: Required for the synthesis of amylose. Destroyed as it is released from the starch granules during the night. The circadian expression is controlled by CCA1 and LHY transcription factors.
Subcellular location: Plastid, chloroplast {ECO:0000269|PubMed:15347792, ECO:0000269|PubMed:25710501}. Note=Exclusively bound to starch granules and found in the soluble fraction only if PTST is absent. {ECO:0000269|PubMed:15347792, ECO:0000269|PubMed:25710501}.
Sequence: MATVTASSNFVSRTSLFNNHGASSCSDVAQITLKGQSLTHCGLRSFNMVDNLQRRSQAKPVSAKSSKRSSKVKTAGKIVCEKGMSVIFIGAEVGPWSKTGGLGDVLGGLPPALAARGHRVMTICPRYDQYKDAWDTCVVVQIKVGDKVENVRFFHCYKRGVDRVFVDHPIFLAKVVGKTGSKIYGPITGVDYNDNQLRFSLLCQAALEAPQVLNLNSSKYFSGPYGEDVVFVANDWHTALLPCYLKSMYQSRGVYMNAKVVFCIHNIAYQGRFAFDDYSLLNLPISFKSSFDFMDGYEKPVKGRKINWMKAAILEAHRVLTVSPYYAQELISGVDRGVELHKYLRMKTVSGIINGMDVQEWNPSTDKYIDIKYDITTVTDAKPLIKEALQAAVGLPVDRDVPVIGFIGRLEEQKGSDILVEAISKFMGLNVQMVILGTGKKKMEAQILELEEKFPGKAVGVAKFNVPLAHMITAGADFIIVPSRFEPCGLIQLHAMRYGTVPIVASTGGLVDTVKDGYTGFHIGRFNVKCEVVDPDDVIATAKAVTRAVAVYGTSAMQEMVKNCMDQDFSWKGPARLWEKVLLSLNVAGSEAGTEGEEIAPLAKENVATP
InterPro domains: - IPR011835: Bacterial/plant glycogen synthase (family) [84-585]
- IPR013534: Starch synthase, catalytic domain (domain) [86-345]
- IPR001296: Glycosyl transferase, family 1 (domain) [398-527]
Interaction partners: - Glucose-1-phosphate adenylyltransferase small subunit, chloroplastic
- Glucose-1-phosphate adenylyltransferase large subunit 3, chloroplastic
- Glucose-1-phosphate adenylyltransferase large subunit 2, chloroplastic
- Probable glucose-1-phosphate adenylyltransferase large subunit, chloroplastic
- Glucose-1-phosphate adenylyltransferase large subunit 1, chloroplastic
- 4-alpha-glucanotransferase DPE2
- 4-alpha-glucanotransferase DPE1, chloroplastic/amyloplastic
- 1,4-alpha-glucan-branching enzyme 3, chloroplastic/amyloplastic
- 1,4-alpha-glucan-branching enzyme 2-2, chloroplastic/amyloplastic
- 1,4-alpha-glucan-branching enzyme 2-1, chloroplastic/amyloplastic
Gene Ontology annotations:
Molecular Function (MF): GO:0003674 (molecular function), GO:0005488 (binding), GO:0036094 (small molecule binding), GO:1901363 (heterocyclic compound binding), GO:0044877 (protein-containing complex binding), GO:0043167 (ion binding), GO:0097159 (organic cyclic compound binding), GO:0097367 (carbohydrate derivative binding), GO:0005515 (protein binding), GO:1901265 (nucleoside phosphate binding), GO:0043168 (anion binding), GO:0000166 (nucleotide binding), GO:0032553 (ribonucleotide binding), GO:0019863 (IgE binding), GO:0035639 (purine ribonucleoside triphosphate binding), GO:0032555 (purine ribonucleotide binding), GO:0017076 (purine nucleotide binding), GO:0005524 (ATP binding), GO:0032559 (adenyl ribonucleotide binding), GO:0030554 (adenyl nucleotide binding)
Biological Process (BP): GO:0008150 (biological process), GO:0008152 (metabolic process), GO:0009058 (biosynthetic process), GO:0071704 (organic substance metabolic process), GO:0043170 (macromolecule metabolic process), GO:1901135 (carbohydrate derivative metabolic process), GO:1901576 (organic substance biosynthetic process), GO:1901137 (carbohydrate derivative biosynthetic process), GO:0009059 (macromolecule biosynthetic process)
Cellular Component (CC): GO:0005575 (cellular component), GO:0110165 (cellular anatomical entity), GO:0005622 (intracellular anatomical structure), GO:0043226 (organelle), GO:0005737 (cytoplasm), GO:0043229 (intracellular organelle), GO:0043227 (membrane-bounded organelle), GO:0009536 (plastid), GO:0009507 (chloroplast), GO:0043231 (intracellular membrane-bounded organelle)