F4IAG2 · SSY3_ARATH
- ProteinStarch synthase 3, chloroplastic/amyloplastic
- GeneSS3
- StatusUniProtKB reviewed (Swiss-Prot)
- Amino acids1042 (go to sequence)
- Protein existenceEvidence at protein level
- Annotation score5/5
Function
function
Involved in the synthesis of glycan chains within amylopectin in leaves. May play a regulatory role in the control of starch accumulation in plastids.
Catalytic activity
- [(1->4)-alpha-D-glucosyl](n) + ADP-alpha-D-glucose = [(1->4)-alpha-D-glucosyl](n+1) + ADP + H+
[(1→4)-α-D-glucosyl](n) RHEA-COMP:9584 + CHEBI:57498 = [(1→4)-α-D-glucosyl](n+1) RHEA-COMP:9587 + CHEBI:456216 + CHEBI:15378
Pathway
Glycan biosynthesis; starch biosynthesis.
Features
Showing features for binding site.
GO annotations
Aspect | Term | |
---|---|---|
Cellular Component | amyloplast | |
Cellular Component | chloroplast | |
Molecular Function | alpha-1,4-glucan synthase activity | |
Molecular Function | glycogen (starch) synthase activity | |
Molecular Function | identical protein binding | |
Molecular Function | starch binding | |
Molecular Function | starch synthase activity | |
Biological Process | amylopectin biosynthetic process | |
Biological Process | starch biosynthetic process |
Keywords
- Molecular function
- Biological process
Enzyme and pathway databases
Protein family/group databases
Names & Taxonomy
Protein names
- Recommended nameStarch synthase 3, chloroplastic/amyloplastic
- EC number
- Short namesAtSS3
- Alternative names
Gene names
Organism names
- Strain
- Taxonomic lineageEukaryota > Viridiplantae > Streptophyta > Embryophyta > Tracheophyta > Spermatophyta > Magnoliopsida > eudicotyledons > Gunneridae > Pentapetalae > rosids > malvids > Brassicales > Brassicaceae > Camelineae > Arabidopsis
Accessions
- Primary accessionF4IAG2
- Secondary accessions
Proteomes
Organism-specific databases
Genome annotation databases
Subcellular Location
Phenotypes & Variants
Disruption phenotype
No visible phenotype under normal growth conditions, but mutant plants accumulate increased levels of starch and have starch granules with alterated morphology.
Variants
We now provide the "Disease & Variants" viewer in its own tab.
The viewer provides 79 variants from UniProt as well as other sources including ClinVar and dbSNP.
PTM/Processing
Features
Showing features for transit peptide, chain.
Type | ID | Position(s) | Description | |||
---|---|---|---|---|---|---|
Transit peptide | 1-44 | Chloroplast | ||||
Sequence: MISYFLNQDFSRKKQGRMAASGPKSSGPRGFGRRTTVGSAQKRT | ||||||
Chain | PRO_0000419770 | 45-1042 | Starch synthase 3, chloroplastic/amyloplastic | |||
Sequence: QKKNGEKDSNATSTATNEVSGISKLPAAKVDVQKQSSVVLNERNVLDRSDIEDGSDRLDKKTTDDDDLLEQKLKLERENLRRKEIETLAAENLARGDRMFVYPVIVKPDEDIEVFLNRNLSTLNNEPDVLIMGAFNEWRWKSFTRRLEKTWIHEDWLSCLLHIPKEAYKMDFVFFNGQSVYDNNDSKDFCVEIKGGMDKVDFENFLLEEKLREQEKLAKEEAERERQKEEKRRIEAQKAAIEADRAQAKAETQKRRELLQPAIKKAVVSAENVWYIEPSDFKAEDTVKLYYNKRSGPLTNSKELWLHGGFNNWVDGLSIVVKLVNAELKDVDPKSGNWWFAEVVVPGGALVIDWVFADGPPKGAFLYDNNGYQDFHALVPQKLPEELYWLEEENMIFRKLQEDRRLKEEVMRAKMEKTARLKAETKERTLKKFLLSQKDVVYTEPLEIQAGNPVTVLYNPANTVLNGKPEVWFRGSFNRWTHRLGPLPPQKMEATDDESSHVKTTAKVPLDAYMMDFVFSEKEDGGIFDNKNGLDYHLPVVGGISKEPPLHIVHIAVEMAPIAKVGGLGDVVTSLSRAVQELNHNVDIVFPKYDCIKHNFVKDLQFNRSYHWGGTEIKVWHGKVEGLSVYFLDPQNGLFQRGCVYGCADDAGRFGFFCHAALEFLLQGGFHPDILHCHDWSSAPVSWLFKDHYTQYGLIKTRIVFTIHNLEFGANAIGKAMTFADKATTVSPTYAKEVAGNSVISAHLYKFHGIINGIDPDIWDPYNDNFIPVPYTSENVVEGKRAAKEELQNRLGLKSADFPVVGIITRLTHQKGIHLIKHAIWRTLERNGQVVLLGSAPDPRIQNDFVNLANQLHSSHGDRARLVLTYDEPLSHLIYAGADFILVPSIFEPCGLTQLIAMRYGAVPVVRKTGGLFDTVFDVDHDKERAQAQVLEPNGFSFDGADAPGVDYALNRAISAWYDGREWFNSLCKTVMEQDWSWNRPALEYLELYHSARK |
Proteomic databases
PTM databases
Expression
Interaction
Binary interactions
Type | Entry 1 | Entry 2 | Number of experiments | Intact | |
---|---|---|---|---|---|
BINARY | F4IAG2 | SS3 F4IAG2 | 4 | EBI-7661720, EBI-7661720 |
Protein-protein interaction databases
Structure
Family & Domains
Features
Showing features for region, coiled coil.
Type | ID | Position(s) | Description | |||
---|---|---|---|---|---|---|
Region | 1-63 | Disordered | ||||
Sequence: MISYFLNQDFSRKKQGRMAASGPKSSGPRGFGRRTTVGSAQKRTQKKNGEKDSNATSTATNEV | ||||||
Coiled coil | 247-302 | |||||
Sequence: ENFLLEEKLREQEKLAKEEAERERQKEEKRRIEAQKAAIEADRAQAKAETQKRREL |
Sequence similarities
Belongs to the glycosyltransferase 1 family. Bacterial/plant glycogen synthase subfamily.
Keywords
- Domain
Phylogenomic databases
Family and domain databases
Sequence
- Sequence statusComplete
- Sequence processingThe displayed sequence is further processed into a mature form.
This entry describes 1 isoforms produced by Alternative splicing. A number of isoforms are produced. According to EST sequences.
F4IAG2-1
This isoform has been chosen as the canonical sequence. All positional information in this entry refers to it. This is also the sequence that appears in the downloadable versions of the entry.
- Name1
- Length1,042
- Mass (Da)118,512
- Last updated2011-06-28 v1
- ChecksumC0481F694FCDC7D2
Computationally mapped potential isoform sequences
There is 1 potential isoform mapped to this entry
Entry | Entry name | Gene name | Length | ||
---|---|---|---|---|---|
F4IAG1 | F4IAG1_ARATH | SS3 | 1094 |
Sequence caution
Features
Showing features for sequence conflict.
Type | ID | Position(s) | Description | |||
---|---|---|---|---|---|---|
Sequence conflict | 741 | in Ref. 3; ABB46391 | ||||
Sequence: G → D | ||||||
Sequence conflict | 1041 | in Ref. 3; ABB46391 | ||||
Sequence: R → C |
Keywords
- Coding sequence diversity
- Technical term
Sequence databases
Nucleotide Sequence | Protein Sequence | Molecule Type | Status | |
---|---|---|---|---|
AC007296 EMBL· GenBank· DDBJ | AAD30251.1 EMBL· GenBank· DDBJ | Genomic DNA | Different initiation | |
CP002684 EMBL· GenBank· DDBJ | AEE28774.1 EMBL· GenBank· DDBJ | Genomic DNA | ||
DQ241810 EMBL· GenBank· DDBJ | ABB46391.1 EMBL· GenBank· DDBJ | mRNA | ||
EF636491 EMBL· GenBank· DDBJ | ABU96740.1 EMBL· GenBank· DDBJ | mRNA | ||
DQ415727 EMBL· GenBank· DDBJ | ABD77100.1 EMBL· GenBank· DDBJ | mRNA |