A0A2U8QQB5 · A0A2U8QQB5_9CAUD
- ProteinSingle-stranded DNA-binding protein
- Gene32
- StatusUniProtKB unreviewed (TrEMBL)
- Organism
- Amino acids302 (go to sequence)
- Protein existenceInferred from homology
- Annotation score3/5
Function
function
Single-stranded DNA-binding protein that participates in viral DNA replication, recombination, and repair. Coats the lagging-strand ssDNA as the replication fork advances. Stimulates the activities of viral DNA polymerase and DnaB-like SF4 replicative helicase, probably via its interaction with the helicase assembly factor. Together with DnaB-like SF4 replicative helicase and the helicase assembly factor, promotes pairing of two homologous DNA molecules containing complementary single-stranded regions and mediates homologous DNA strand exchange. Promotes also the formation of joint molecules. mRNA specific autogenous translational repressor.
Features
Showing features for binding site.
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 | |
---|---|---|
Molecular Function | metal ion binding | |
Molecular Function | single-stranded DNA binding | |
Biological Process | bidirectional double-stranded viral DNA replication | |
Biological Process | DNA recombination | |
Biological Process | DNA repair |
Keywords
- Molecular function
- Biological process
- Ligand
Names & Taxonomy
Protein names
- Recommended nameSingle-stranded DNA-binding protein
- Short namesSSB protein
- Alternative names
Gene names
Organism names
- Organism
- Taxonomic lineageViruses > Duplodnaviria > Heunggongvirae > Uroviricota > Caudoviricetes > Straboviridae > Tevenvirinae > Tequatrovirus > Tequatrovirus ecomnbg2
Accessions
- Primary accessionA0A2U8QQB5
Proteomes
Interaction
Subunit
Homodimer in the absence of DNA, monomer when binding DNA. Interacts with the DNA helicase assembly protein; a ternary complex between the helicase assembly protein, the single-stranded DNA-binding protein and ssDNA is an obligatory intermediate in the helicase loading mechanism. Part of the replicase complex that includes the DNA polymerase, the polymerase clamp, the clamp loader complex, the single-stranded DNA binding protein, the primase, the DnaB-like SF4 replicative helicase and the helicase assembly factor. Interacts (via C-terminus) with the viral SF1 dDA helicase. Interacts with the viral SF2 UvsW repair helicase.
Structure
Family & Domains
Features
Showing features for region, domain, compositional bias.
Type | ID | Position(s) | Description | |||
---|---|---|---|---|---|---|
Region | 3-7 | LAST | ||||
Sequence: KRKST | ||||||
Domain | 40-240 | Bacteriophage T4 Gp32 single-stranded DNA-binding | ||||
Sequence: GNGQAVIRFLPSKNDEQAPFAILVNHGFKKNGKWYIENCSSTHGDYDSCPVCQYISKNDLYNTDNKEYSLVKRKTSYWANILVVKDPAAPENEGKVFKYRFGKKIWDKINAMIAVDVEMGETPVDVTCPWEGANFVLKVKQVSGFSNYDESKFLNQSAIPNIDDESFQKELFEQMVDLSEMTSKDKFKSFEELSTKFSQVM | ||||||
Region | 275-302 | Disordered | ||||
Sequence: TEDDFMSSSSGSSSSADDTDLDDLLNDL | ||||||
Compositional bias | 278-293 | Polar residues | ||||
Sequence: DFMSSSSGSSSSADDT |
Domain
The acidic C-terminus is involved in modulating the ssDNA binding properties. The N-terminus LAST motif is involved in the cooperative binding of the protein to ssDNA.
Sequence similarities
Belongs to the Tequatrovirus single-stranded DNA-binding protein family.
Family and domain databases
Sequence
- Sequence statusComplete
- Length302
- Mass (Da)33,522
- Last updated2018-09-12 v1
- Checksum032B78CB2FFF415D
Features
Showing features for compositional bias.
Type | ID | Position(s) | Description | |||
---|---|---|---|---|---|---|
Compositional bias | 278-293 | Polar residues | ||||
Sequence: DFMSSSSGSSSSADDT |