P04506 · SIGM1_REOVL
- ProteinOuter capsid protein sigma-1
- GeneS1
- StatusUniProtKB reviewed (Swiss-Prot)
- Amino acids470 (go to sequence)
- Protein existenceEvidence at protein level
- Annotation score3/5
Function
function
Fiber-like molecule that attaches the virion to the host cell membrane by binding to the primary receptor F11R/JAM-A and to sialic acid containing proteins (coreceptor). The interaction of sigma-1 with F11R is required for NF-kB activation and apoptosis. Binding to both sialic acid and F11R is required to induce maximal levels of apoptosis (By similarity).
GO annotations
all annotations | all molecular function | virus receptor activity | dna binding | rna binding | cytoskeletal motor activity | catalytic activity | gtpase activity | structural molecule activity | transporter activity | cytoskeletal protein binding | lipid binding | cyclase activity | antioxidant activity | oxidoreductase activity | transferase activity | hydrolase activity | lyase activity | isomerase activity | ligase activity | protein tag activity | cargo receptor activity | histone binding | protein folding chaperone | translation regulator activity | nutrient reservoir activity | receptor ligand activity | molecular transducer activity | molecular adaptor activity | toxin activity | cell adhesion mediator activity | molecular function regulator activity | virus coreceptor activity | catalytic activity, acting on a protein | catalytic activity, acting on dna | catalytic activity, acting on rna | molecular carrier activity | transcription regulator activity | general transcription initiation factor activity | molecular sensor activity | molecular sequestering activity | atp-dependent activity | other molecular function | all biological process | mitotic cell cycle | cytokinesis | cytoplasmic translation | immune system process | muscle system process | circulatory system process | renal system process | respiratory system process | carbohydrate metabolic process | generation of precursor metabolites and energy | dna replication | dna repair | dna recombination | chromatin organization | dna-templated transcription | regulation of dna-templated transcription | trna metabolic process | protein folding | protein glycosylation | amino acid metabolic process | modified amino acid metabolic process | lipid metabolic process | vitamin metabolic process | sulfur compound metabolic process | intracellular protein transport | nucleocytoplasmic transport | autophagy | inflammatory response | mitochondrion organization | cytoskeleton organization | microtubule-based movement | peroxisome organization | lysosome organization | chromosome segregation | cell adhesion | establishment or maintenance of cell polarity | programmed cell death | photosynthesis | mrna metabolic process | snrna metabolic process | vesicle-mediated transport | reproductive process | digestive system process | signaling | cell differentiation | protein catabolic process | extracellular matrix organization | regulatory ncrna-mediated gene silencing | telomere organization | cell junction organization | wound healing | ribosome biogenesis | cilium organization | anatomical structure development | cell motility | nervous system process | endocrine process | protein maturation | transmembrane transport | nucleobase-containing small molecule metabolic process | hepaticobiliary system process | membrane organization | protein-containing complex assembly | cell wall organization or biogenesis | nitrogen cycle metabolic process | protein localization to plasma membrane | defense response to other organism | detoxification | meiotic nuclear division | mitotic nuclear division | mitochondrial gene expression | carbohydrate derivative metabolic process | other biological process | all cellular component | nuclear chromosome | extracellular region | extracellular space | cell wall | nucleus | nuclear envelope | nucleoplasm | chromosome | nucleolus | mitochondrion | lysosome | endosome | vacuole | peroxisome | endoplasmic reticulum | golgi apparatus | lipid droplet | microtubule organizing center | cytosol | ribosome | cytoskeleton | plasma membrane | cilium | plastid | thylakoid | external encapsulating structure | extracellular matrix | cytoplasmic vesicle | organelle | other cellular component | |||
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Aspect | Term | |
---|---|---|
Cellular Component | viral capsid | |
Cellular Component | viral outer capsid | |
Biological Process | cell adhesion | |
Biological Process | symbiont entry into host cell | |
Biological Process | virion attachment to host cell |
Keywords
- Molecular function
- Biological process
Names & Taxonomy
Protein names
- Recommended nameOuter capsid protein sigma-1
- Short namesSigma1
- Alternative names
Gene names
Organism names
- Strain
- Taxonomic lineageViruses > Riboviria > Orthornavirae > Duplornaviricota > Resentoviricetes > Reovirales > Spinareoviridae > Orthoreovirus > Mammalian orthoreovirus
- Virus hosts
Accessions
- Primary accessionP04506
- Secondary accessions
Proteomes
Subcellular Location
UniProt Annotation
GO Annotation
Note: Found in the outer capsid (36 copies).
Keywords
- Cellular component
PTM/Processing
Features
Showing features for chain, glycosylation.
Type | ID | Position(s) | Description | |||
---|---|---|---|---|---|---|
Chain | PRO_0000040667 | 1-470 | Outer capsid protein sigma-1 | |||
Sequence: MDASLITEIRKIVLQLSVSSNGSQSKEIEEIKKQVQVNVDDIRAANIKLDGLGRQIADISNSISTIESRLGEMDNRLVGISSQVTQLSNSVSQNTQSISSLGDRINAVEPRVDSLDTVTSNLTGRTSTLEADVGSLRTELAALTTRVTTEVTRLDGLINSGQNSIGELSTRLSNVETSMVTTAGRGLQKNGNTLNVIVGNGMWFNSSNQLQLDLSGQSKGVGFVGTGMVVKIDTNYFAYNSNGEITLVSQINELPSRVSTLESAKIDSVLPPLTVREASGVRTLSFGYDTSDFTIINSVLSLRSRLTLPTYRYPLELDTANNRVQVADRFGMRTGTWTGQLQYQHPQLSWRANVTLNLMKVDDWLVLSFSQMTTNSIMADGKFVINFVSGLSSGWQTGDTEPSSTIDPLSTTFAAVQFLNNGQRIDAFRIMGVSEWTDGELEIKNYGGTYTGHTQVYWAPWTIMYPCNVR | ||||||
Glycosylation | 21 | N-linked (GlcNAc...) asparagine; by host | ||||
Sequence: N | ||||||
Glycosylation | 121 | N-linked (GlcNAc...) asparagine; by host | ||||
Sequence: N | ||||||
Glycosylation | 205 | N-linked (GlcNAc...) asparagine; by host | ||||
Sequence: N | ||||||
Glycosylation | 353 | N-linked (GlcNAc...) asparagine; by host | ||||
Sequence: N |
Post-translational modification
Undergoes dramatic conformational rearrangements during viral disassembly in the endocytic pathway.
Keywords
- PTM
PTM databases
Interaction
Subunit
Homotrimer. Interacts (via the head region) with human F11R (By similarity).
Structure
Family & Domains
Features
Showing features for region, coiled coil.
Type | ID | Position(s) | Description | |||
---|---|---|---|---|---|---|
Region | 1-324 | Tail | ||||
Sequence: MDASLITEIRKIVLQLSVSSNGSQSKEIEEIKKQVQVNVDDIRAANIKLDGLGRQIADISNSISTIESRLGEMDNRLVGISSQVTQLSNSVSQNTQSISSLGDRINAVEPRVDSLDTVTSNLTGRTSTLEADVGSLRTELAALTTRVTTEVTRLDGLINSGQNSIGELSTRLSNVETSMVTTAGRGLQKNGNTLNVIVGNGMWFNSSNQLQLDLSGQSKGVGFVGTGMVVKIDTNYFAYNSNGEITLVSQINELPSRVSTLESAKIDSVLPPLTVREASGVRTLSFGYDTSDFTIINSVLSLRSRLTLPTYRYPLELDTANNRV | ||||||
Coiled coil | 26-46 | |||||
Sequence: KEIEEIKKQVQVNVDDIRAAN | ||||||
Region | 325-470 | Head | ||||
Sequence: QVADRFGMRTGTWTGQLQYQHPQLSWRANVTLNLMKVDDWLVLSFSQMTTNSIMADGKFVINFVSGLSSGWQTGDTEPSSTIDPLSTTFAAVQFLNNGQRIDAFRIMGVSEWTDGELEIKNYGGTYTGHTQVYWAPWTIMYPCNVR |
Sequence similarities
Belongs to the orthoreovirus sigma-1 protein family.
Keywords
- Domain
Family and domain databases
Sequence
- Sequence statusComplete
- Length470
- Mass (Da)51,404
- Last updated1990-11-01 v2
- ChecksumF4D18989AD54491C
Sequence caution
Features
Showing features for sequence conflict.
Type | ID | Position(s) | Description | |||
---|---|---|---|---|---|---|
Sequence conflict | 91 | in Ref. 1; AAA66877 and 2; AAA47276 | ||||
Sequence: V → G | ||||||
Sequence conflict | 169 | in Ref. 1; AAA66877 | ||||
Sequence: S → F | ||||||
Sequence conflict | 384 | in Ref. 2; AAA47276 | ||||
Sequence: V → L | ||||||
Sequence conflict | 409 | in Ref. 4; AAA47242 | ||||
Sequence: L → W |
Keywords
- Technical term
Sequence databases
Nucleotide Sequence | Protein Sequence | Molecule Type | Status | |
---|---|---|---|---|
M10260 EMBL· GenBank· DDBJ | AAA66877.1 EMBL· GenBank· DDBJ | Genomic RNA | Frameshift | |
M14779 EMBL· GenBank· DDBJ | AAA47276.1 EMBL· GenBank· DDBJ | Genomic RNA | Frameshift | |
M32860 EMBL· GenBank· DDBJ | AAA47267.1 EMBL· GenBank· DDBJ | Genomic RNA | ||
M35963 EMBL· GenBank· DDBJ | AAA47242.1 EMBL· GenBank· DDBJ | Genomic RNA | ||
EF494445 EMBL· GenBank· DDBJ | ABP48923.1 EMBL· GenBank· DDBJ | Genomic RNA | ||
AH002406 EMBL· GenBank· DDBJ | AAA47240.1 EMBL· GenBank· DDBJ | Genomic RNA |