P16032 · RBS1_MESCR
- ProteinRibulose bisphosphate carboxylase small subunit, chloroplastic 1
- GeneRBCS1
- StatusUniProtKB reviewed (Swiss-Prot)
- Amino acids182 (go to sequence)
- Protein existenceEvidence at transcript level
- Annotation score3/5
Function
function
RuBisCO catalyzes two reactions: the carboxylation of D-ribulose 1,5-bisphosphate, the primary event in carbon dioxide fixation, as well as the oxidative fragmentation of the pentose substrate. Both reactions occur simultaneously and in competition at the same active site. Although the small subunit is not catalytic it is essential for maximal activity.
Miscellaneous
The basic functional RuBisCO is composed of a large chain homodimer in a 'head-to-tail' conformation. In form I RuBisCO this homodimer is arranged in a barrel-like tetramer with the small subunits forming a tetrameric 'cap' on each end of the 'barrel'.
GO annotations
all annotations | all molecular function | nucleotide binding | molecular_function | nucleic acid binding | dna binding | chromatin binding | dna-binding transcription factor activity | rna binding | cytoskeletal motor activity | catalytic activity | nuclease activity | signaling receptor binding | structural molecule activity | transporter activity | binding | protein binding | translation factor activity, rna binding | lipid binding | kinase activity | transferase activity | hydrolase activity | oxygen binding | enzyme regulator activity | carbohydrate binding | signaling receptor activity | translation regulator activity | transcription regulator activity | other molecular function | all biological process | carbohydrate metabolic process | generation of precursor metabolites and energy | nucleobase-containing compound metabolic process | dna metabolic process | translation | lipid metabolic process | transport | response to stress | cell cycle | cell communication | signal transduction | cell-cell signaling | multicellular organism development | circadian rhythm | biological_process | metabolic process | catabolic process | biosynthetic process | response to light stimulus | response to external stimulus | tropism | response to biotic stimulus | response to abiotic stimulus | response to endogenous stimulus | embryo development | post-embryonic development | fruit ripening | abscission | pollination | flower development | cellular process | programmed cell death | photosynthesis | cellular component organization | cell growth | protein metabolic process | cellular homeostasis | secondary metabolic process | reproductive process | cell differentiation | protein modification process | growth | epigenetic regulation of gene expression | response to chemical | anatomical structure development | regulation of molecular function | other biological process | all cellular component | cellular_component | extracellular region | cell wall | intracellular anatomical structure | nucleus | nuclear envelope | nucleoplasm | nucleolus | cytoplasm | mitochondrion | lysosome | endosome | vacuole | peroxisome | endoplasmic reticulum | golgi apparatus | cytosol | ribosome | cytoskeleton | plasma membrane | chloroplast | plastid | thylakoid | membrane | external encapsulating structure | other cellular component | |||
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Aspect | Term | |
---|---|---|
Cellular Component | chloroplast | |
Molecular Function | ribulose-bisphosphate carboxylase activity | |
Biological Process | photorespiration | |
Biological Process | reductive pentose-phosphate cycle |
Keywords
- Biological process
Names & Taxonomy
Protein names
- Recommended nameRibulose bisphosphate carboxylase small subunit, chloroplastic 1
- Short namesRuBisCO small subunit 1
Gene names
Organism names
- Taxonomic lineageEukaryota > Viridiplantae > Streptophyta > Embryophyta > Tracheophyta > Spermatophyta > Magnoliopsida > eudicotyledons > Gunneridae > Pentapetalae > Caryophyllales > Aizoaceae > Mesembryanthemum > Mesembryanthemum subgen. Cryophytum
Accessions
- Primary accessionP16032
Subcellular Location
PTM/Processing
Features
Showing features for transit peptide, chain.
Type | ID | Position(s) | Description | |||
---|---|---|---|---|---|---|
Transit peptide | 1-56 | Chloroplast | ||||
Sequence: MASSMVSSAAVATVNRTPAQASMVAPFNGLKSVAAFPVTKKNNDITSVATNGGRVQ | ||||||
Chain | PRO_0000031527 | 57-182 | Ribulose bisphosphate carboxylase small subunit, chloroplastic 1 | |||
Sequence: CMQVWPPLGKKKFETLSYLPPLSEESLMKEVQYLLNNGWVPCLEFEPTHGFVYREHGNTPGYYDGRYWTMWKLPMFGCTDPSQVVAELEEAKKAYPEAFIRIIGFDNVRQVQCISFIAYKPASYDA |
Expression
Induction
The most highly expressed of the 6 small subunit genes.
Interaction
Subunit
Heterohexadecamer of 8 large and 8 small subunits.
Structure
Sequence
- Sequence statusComplete
- Sequence processingThe displayed sequence is further processed into a mature form.
- Length182
- Mass (Da)20,276
- Last updated1994-10-01 v2
- Checksum7AB023654AF05665
Features
Showing features for sequence conflict.
Type | ID | Position(s) | Description | |||
---|---|---|---|---|---|---|
Sequence conflict | 25 | in Ref. 2; AAA33035 | ||||
Sequence: A → V | ||||||
Sequence conflict | 145 | in Ref. 2; AAA33035 | ||||
Sequence: E → R |