Q99D35 (POLG_DEN3C) Reviewed, UniProtKB/Swiss-Prot
Last modified
November 16, 2011.
Version 79.
History...
Names·Attributes·General annotation·Ontologies·Sequence annotation·Sequences·References·Web links·Cross-refs·Entry info·DocumentsCustomize order
Names·Attributes·General annotation·Ontologies·Sequence annotation·Sequences·References·Web links·Cross-refs·Entry info·DocumentsCustomize orderNames and origin
Protein attributes
| Sequence length | 3390 AA. |
| Sequence status | Complete. |
| Sequence processing | The displayed sequence is further processed into a mature form. |
| Protein existence | Inferred from homology |
General annotation (Comments)
| Function | Capsid protein C self-assembles to form an icosahedral capsid about 30 nm in diameter. The capsid encapsulates the genomic RNA By similarity. prM acts as a chaperone for envelope protein E during intracellular virion assembly by masking and inactivating envelope protein E fusion peptide. prM is matured in the last step of virion assembly, presumably to avoid catastrophic activation of the viral fusion peptide induced by the acidic pH of the trans-Golgi network. After cleavage by host furin, the pr peptide is released in the extracellular medium and small envelope protein M and envelope protein E homodimers are dissociated By similarity. Envelope protein E binding to host cell surface receptor is followed by virus internalization through clathrin-mediated endocytosis. Envelope protein E is subsequently involved in membrane fusion between virion and host late endosomes. Synthesized as an homodimer with prM which acts as a chaperone for envelope protein E. After cleavage of prM, envelope protein E dissociate from small envelope protein M and homodimerizes By similarity. Non-structural protein 1 is involved in virus replication and regulation of the innate immune response. Soluble and membrane-associated NS1 may activate human complement and induce host vascular leakage. This effect might explain the clinical manifestations of dengue hemorrhagic fever and dengue shock syndrome By similarity. Non-structural protein 2A may be involved viral RNA replication and capsid assembly Potential. Non-structural protein 2B is a required cofactor for the serine protease function of NS3 By similarity. Serine protease NS3 displays three enzymatic activities: serine protease, NTPase and RNA helicase. NS3 serine protease, in association with NS2B, performs its autocleavage and cleaves the polyprotein at dibasic sites in the cytoplasm: C-prM, NS2A-NS2B, NS2B-NS3, NS3-NS4A, NS4A-2K and NS4B-NS5. NS3 RNA helicase binds RNA and unwinds dsRNA in the 3' to 5' direction By similarity. Non-structural protein 4A induces host endoplasmic reticulum membrane rearrangements leading to the formation of virus-induced membranous vesicles hosting the dsRNA and polymerase, functionning as a replication complex. NS4A might also regulate the ATPase activity of the NS3 helicase By similarity. Peptide 2k functions as a signal peptide for NS4B and is required for the interferon antagonism activity of the latter By similarity. Non-structural protein 4B inhibits interferon (IFN)-induced host STAT1 phosphorylation and nuclear translocation, thereby preventing the establishment of cellular antiviral state by blocking the IFN-alpha/beta pathway By similarity. RNA-directed RNA polymerase NS5 replicates the viral (+) and (-) genome, and performs the capping of genomes in the cytoplasm. NS5 methylates viral RNA cap at guanine N-7 and ribose 2'-O positions. Besides its role in genome replication, also prevents the establishment of cellular antiviral state by blocking the interferon-alpha/beta (IFN-alpha/beta) signaling pathway. Inhibits host TYK2 and STAT2 phosphorylation, thereby preventing activation of JAK-STAT signaling pathway By similarity. |
| Catalytic activity | Selective hydrolysis of -Xaa-Xaa-|-Yaa- bonds in which each of the Xaa can be either Arg or Lys and Yaa can be either Ser or Ala. Nucleoside triphosphate + RNA(n) = diphosphate + RNA(n+1). NTP + H2O = NDP + phosphate. ATP + H2O = ADP + phosphate. S-adenosyl-L-methionine + G(5')pppR-RNA = S-adenosyl-L-homocysteine + m7G(5')pppR-RNA. S-adenosyl-L-methionine + m7G(5')pppR-RNA = S-adenosyl-L-homocysteine + m7G(5')pppRm-RNA. |
| Subunit structure | Capsid protein C forms homodimers. prM and envelope protein E form heterodimers in the endoplasmic reticulum and Golgi. In immature particles, there are 60 icosaedrally organized trimeric spikes on the surface. Each spike consists of three heterodimers of envelope protein M precursor (prM) and envelope protein E. NS1 forms homodimers as well as homohexamers when secreted. NS1 may interact with NS4A. NS3 and NS2B form a heterodimer. NS3 is the catalytic subunit, whereas NS2B strongly stimulates the latter, acting as a cofactor. In the absence of the NS2B, NS3 protease is unfolded and inactive. NS3 interacts with unphosphorylated NS5; this interaction stimulates NS5 guanylyltransferase activity. NS5 interacts with host STAT2; this interaction inhibits the phosphorylation of the latter, and, when all viral proteins are present (polyprotein), targets STAT2 for degradation By similarity. |
| Subcellular location | Capsid protein C: Virion Potential. Peptide pr: Secreted By similarity. Small envelope protein M: Virion membrane; Multi-pass membrane protein By similarity. Host endoplasmic reticulum membrane; Multi-pass membrane protein By similarity. Envelope protein E: Virion membrane; Multi-pass membrane protein By similarity. Host endoplasmic reticulum membrane; Multi-pass membrane protein By similarity. Non-structural protein 1: Secreted. Host endoplasmic reticulum membrane; Peripheral membrane protein; Lumenal side By similarity. Non-structural protein 2A-alpha: Host endoplasmic reticulum membrane; Multi-pass membrane protein Potential. Non-structural protein 2A: Host endoplasmic reticulum membrane; Multi-pass membrane protein Potential. Serine protease subunit NS2B: Host endoplasmic reticulum membrane; Peripheral membrane protein; Cytoplasmic side By similarity. Serine protease NS3: Host endoplasmic reticulum membrane; Peripheral membrane protein; Cytoplasmic side By similarity. Note: Remains non-covalently associated to NS3 protease By similarity. Non-structural protein 4A: Host endoplasmic reticulum membrane; Multi-pass membrane protein By similarity. Note: Located in RE-associated vesicles hosting the replication complex. Non-structural protein 4B: Host endoplasmic reticulum membrane; Multi-pass membrane protein By similarity. RNA-directed RNA polymerase NS5: Host endoplasmic reticulum membrane; Peripheral membrane protein; Cytoplasmic side By similarity. Host nucleus By similarity. Note: Located in RE-associated vesicles hosting the replication complex. |
| Domain | Transmembrane domains of the small envelope protein M and envelope protein E contains an endoplasmic reticulum retention signals By similarity. |
| Post-translational modification | Specific enzymatic cleavages in vivo yield mature proteins. The nascent protein C contains a C-terminal hydrophobic domain that act as a signal sequence for translocation of prM into the lumen of the ER. Mature protein C is cleaved at a site upstream of this hydrophobic domain by NS3. prM is cleaved in post-Golgi vesicles by a host furin, releasing the mature small envelope protein M, and peptide pr. Non-structural protein 2A-alpha, a C-terminally truncated form of non-structural protein 2A, results from partial cleavage by NS3. Peptide 2K acts as a signal sequence and is removed from the N-terminus of NS4B by the host signal peptidase in the ER lumen. Signal cleavage at the 2K-4B site requires a prior NS3 protease-mediated cleavage at the 4A-2K site By similarity. RNA-directed RNA polymerase NS5 is phosphorylated on serines residues. This phosphorylation may trigger NS5 nuclear localization By similarity. Envelope protein E and non-structural protein 1 are N-glycosylated By similarity. |
| Sequence similarities | Contains 1 helicase ATP-binding domain. Contains 1 helicase C-terminal domain. Contains 1 peptidase S7 domain. Contains 1 RdRp catalytic domain. |
Ontologies
Sequence annotation (Features)
| Feature key | Position(s) | Length | Description | Graphical view | Feature identifier | ||||||
Molecule processing | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Chain | 1 – 3390 | 3390 | Genome polyprotein | PRO_0000405222 | |||||||
| Chain | 1 – 100 | 100 | Capsid protein C By similarity | PRO_0000268043 | |||||||
| Propeptide | 101 – 114 | 14 | ER anchor for the protein C, removed in mature form by serine protease NS3 | PRO_0000268044 | |||||||
| Chain | 115 – 280 | 166 | prM By similarity | PRO_0000268045 | |||||||
| Chain | 115 – 205 | 91 | Peptide pr By similarity | PRO_0000268046 | |||||||
| Chain | 206 – 280 | 75 | Small envelope protein M By similarity | PRO_0000268047 | |||||||
| Chain | 281 – 773 | 493 | Envelope protein E By similarity | PRO_0000268048 | |||||||
| Chain | 774 – 1125 | 352 | Non-structural protein 1 By similarity | PRO_0000268049 | |||||||
| Chain | 1126 – 1343 | 218 | Non-structural protein 2A By similarity | PRO_0000268050 | |||||||
| Chain | 1126 – 1313 | 188 | Non-structural protein 2A-alpha By similarity | PRO_0000268051 | |||||||
| Chain | 1344 – 1473 | 130 | Serine protease subunit NS2B By similarity | PRO_0000268052 | |||||||
| Chain | 1474 – 2092 | 619 | Serine protease NS3 By similarity | PRO_0000268053 | |||||||
| Chain | 2093 – 2219 | 127 | Non-structural protein 4A By similarity | PRO_0000268054 | |||||||
| Peptide | 2220 – 2242 | 23 | Peptide 2k | PRO_0000268055 | |||||||
| Chain | 2243 – 2490 | 248 | Non-structural protein 4B By similarity | PRO_0000268056 | |||||||
| Chain | 2491 – 3390 | 900 | RNA-directed RNA polymerase NS5 By similarity | PRO_0000268057 | |||||||
Regions | |||||||||||
| Topological domain | 1 – 100 | 100 | Cytoplasmic Potential | ||||||||
| Transmembrane | 101 – 118 | 18 | Helical; Potential | ||||||||
| Topological domain | 119 – 243 | 125 | Extracellular Potential | ||||||||
| Transmembrane | 244 – 264 | 21 | Helical; Potential | ||||||||
| Topological domain | 265 | 1 | Cytoplasmic Potential | ||||||||
| Transmembrane | 266 – 280 | 15 | Helical; Potential | ||||||||
| Topological domain | 281 – 723 | 443 | Extracellular Potential | ||||||||
| Intramembrane | 724 – 744 | 21 | Helical; Potential | ||||||||
| Topological domain | 745 – 750 | 6 | Extracellular Potential | ||||||||
| Intramembrane | 751 – 771 | 21 | Helical; Potential | ||||||||
| Topological domain | 772 – 1123 | 352 | Extracellular Potential | ||||||||
| Transmembrane | 1124 – 1144 | 21 | Helical; Potential | ||||||||
| Topological domain | 1145 – 1154 | 10 | Cytoplasmic Potential | ||||||||
| Transmembrane | 1155 – 1175 | 21 | Helical; Potential | ||||||||
| Topological domain | 1176 – 1196 | 21 | Lumenal Potential | ||||||||
| Transmembrane | 1197 – 1217 | 21 | Helical; Potential | ||||||||
| Topological domain | 1218 – 1282 | 65 | Cytoplasmic Potential | ||||||||
| Transmembrane | 1283 – 1303 | 21 | Helical; Potential | ||||||||
| Topological domain | 1304 – 1315 | 12 | Lumenal Potential | ||||||||
| Transmembrane | 1316 – 1336 | 21 | Helical; Potential | ||||||||
| Topological domain | 1337 – 1344 | 8 | Cytoplasmic Potential | ||||||||
| Transmembrane | 1345 – 1365 | 21 | Helical; Potential | ||||||||
| Topological domain | 1366 – 1368 | 3 | Lumenal Potential | ||||||||
| Transmembrane | 1369 – 1389 | 21 | Helical; Potential | ||||||||
| Topological domain | 1390 – 1443 | 54 | Cytoplasmic Potential | ||||||||
| Intramembrane | 1444 – 1464 | 21 | Helical; Potential | ||||||||
| Topological domain | 1465 – 2146 | 682 | Cytoplasmic Potential | ||||||||
| Transmembrane | 2147 – 2167 | 21 | Helical; Potential | ||||||||
| Topological domain | 2168 – 2169 | 2 | Lumenal Potential | ||||||||
| Intramembrane | 2170 – 2190 | 21 | Helical; Potential | ||||||||
| Topological domain | 2191 | 1 | Lumenal Potential | ||||||||
| Transmembrane | 2192 – 2212 | 21 | Helical; Potential | ||||||||
| Topological domain | 2213 – 2227 | 15 | Cytoplasmic Potential | ||||||||
| Transmembrane | 2228 – 2248 | 21 | Helical; Note=Signal for NS4B; Potential | ||||||||
| Topological domain | 2249 – 2273 | 25 | Lumenal Potential | ||||||||
| Intramembrane | 2274 – 2294 | 21 | Helical; Potential | ||||||||
| Topological domain | 2295 – 2305 | 11 | Lumenal Potential | ||||||||
| Intramembrane | 2306 – 2326 | 21 | Helical; Potential | ||||||||
| Topological domain | 2327 – 2346 | 20 | Lumenal Potential | ||||||||
| Transmembrane | 2347 – 2367 | 21 | Helical; Potential | ||||||||
| Topological domain | 2368 – 2412 | 45 | Cytoplasmic Potential | ||||||||
| Transmembrane | 2413 – 2433 | 21 | Helical; Potential | ||||||||
| Topological domain | 2434 – 2458 | 25 | Lumenal Potential | ||||||||
| Transmembrane | 2459 – 2479 | 21 | Helical; Potential | ||||||||
| Topological domain | 2480 – 3390 | 911 | Cytoplasmic Potential | ||||||||
| Domain | 1474 – 1651 | 178 | Peptidase S7 | ||||||||
| Domain | 1654 – 1810 | 157 | Helicase ATP-binding | ||||||||
| Domain | 1821 – 1986 | 166 | Helicase C-terminal | ||||||||
| Domain | 3018 – 3168 | 151 | RdRp catalytic | ||||||||
| Nucleotide binding | 1667 – 1674 | 8 | ATP Potential | ||||||||
| Region | 33 – 74 | 42 | Hydrophobic; homodimerization of capsid protein C By similarity | ||||||||
| Region | 1396 – 1435 | 40 | Interacts with and activates NS3 protease By similarity | ||||||||
| Motif | 1758 – 1761 | 4 | DEAH box | ||||||||
Sites | |||||||||||
| Active site | 1524 | 1 | Charge relay system; for serine protease NS3 activity By similarity | ||||||||
| Active site | 1548 | 1 | Charge relay system; for serine protease NS3 activity By similarity | ||||||||
| Active site | 1608 | 1 | Charge relay system; for serine protease NS3 activity By similarity | ||||||||
| Active site | 2551 | 1 | For 2'-O-methyltransferase activity By similarity | ||||||||
| Active site | 2636 | 1 | For 2'-O-methyltransferase and N-7 methyltransferase activity By similarity | ||||||||
| Active site | 2670 | 1 | For 2'-O-methyltransferase activity By similarity | ||||||||
| Active site | 2706 | 1 | For 2'-O-methyltransferase activity By similarity | ||||||||
| Site | 100 – 101 | 2 | Cleavage; by viral protease NS3 Potential | ||||||||
| Site | 114 – 115 | 2 | Cleavage; by host signal peptidase By similarity | ||||||||
| Site | 205 – 206 | 2 | Cleavage; by host furin Potential | ||||||||
| Site | 280 – 281 | 2 | Cleavage; by host signal peptidase Potential | ||||||||
| Site | 773 – 774 | 2 | Cleavage; by host signal peptidase Potential | ||||||||
| Site | 1125 – 1126 | 2 | Cleavage; by host By similarity | ||||||||
| Site | 1343 – 1344 | 2 | Cleavage; by viral protease NS3 Potential | ||||||||
| Site | 1473 – 1474 | 2 | Cleavage; by autolysis Potential | ||||||||
| Site | 2092 – 2093 | 2 | Cleavage; by autolysis Potential | ||||||||
| Site | 2219 – 2220 | 2 | Cleavage; by viral protease NS3 Potential | ||||||||
| Site | 2242 – 2243 | 2 | Cleavage; by host signal peptidase Potential | ||||||||
| Site | 2490 – 2491 | 2 | Cleavage; by viral protease NS3 Potential | ||||||||
Amino acid modifications | |||||||||||
| Glycosylation | 183 | 1 | N-linked (GlcNAc...); by host Potential | ||||||||
| Glycosylation | 347 | 1 | N-linked (GlcNAc...); by host Potential | ||||||||
| Glycosylation | 433 | 1 | N-linked (GlcNAc...); by host Potential | ||||||||
| Glycosylation | 980 | 1 | N-linked (GlcNAc...); by host Potential | ||||||||
| Glycosylation | 2300 | 1 | N-linked (GlcNAc...); by host Potential | ||||||||
| Glycosylation | 2304 | 1 | N-linked (GlcNAc...); by host Potential | ||||||||
| Glycosylation | 2456 | 1 | N-linked (GlcNAc...); by host Potential | ||||||||
| Disulfide bond | 283 ↔ 310 | By similarity | |||||||||
| Disulfide bond | 340 ↔ 401 | By similarity | |||||||||
| Disulfide bond | 354 ↔ 385 | By similarity | |||||||||
| Disulfide bond | 372 ↔ 396 | By similarity | |||||||||
| Disulfide bond | 463 ↔ 563 | By similarity | |||||||||
| Disulfide bond | 580 ↔ 611 | By similarity | |||||||||
Sequences
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References
Web resources
Cross-references
Sequence databases | |
|---|---|
| EMBL GenBank DDBJ | AF317645 Genomic RNA. Translation: AAK01920.1. |
3D structure databases | |
| HSSP | HSSP built from PDB template 1UZG based on UniProtKB P27915. |
| ProteinModelPortal | Q99D35. |
| SMR | Q99D35. Positions 21-100, 281-672, 1493-2092, 2497-2757, 2763-3373. |
| ModBase | Search... |
Protein family/group databases | |
| MEROPS | S07.001. |
Protocols and materials databases | |
| StructuralBiologyKnowledgebase | Search... |
Family and domain databases | |
| InterPro | IPR014001. DEAD-like_helicase. IPR011492. DEAD_Flavivir. IPR000069. Env_glycoprot_M_flavivir. IPR013756. Flav_glyE_cen_dom_subdom2. IPR013754. Flav_glyE_dim. IPR001122. Flavi_capsidC. IPR001157. Flavi_NS1. IPR000752. Flavi_NS2A. IPR000487. Flavi_NS2B. IPR000404. Flavi_NS4A. IPR001528. Flavi_NS4B. IPR002535. Flavi_propep. IPR000336. Flv_glyE_Ig-like. IPR014412. Gen_Poly_FLV. IPR011999. GlycoprotE_cen/dimer_Flavivir. IPR011998. GlycoprotE_cen/dimer_vir. IPR001650. Helicase_C. IPR014756. Ig_E-set. IPR009003. Pept_cys/ser_Trypsin-like. IPR001850. Peptidase_S7. IPR000208. RNA-dir_pol_flavivirus. IPR007094. RNA-dir_pol_PSvirus. IPR002877. rRNA_MeTrfase_RrmJ/FtsJ. [Graphical view] |
| Gene3D | G3DSA:3.30.67.10. Flav_glyE_cen_2. 1 hit. G3DSA:2.60.98.10. Flav_glyE_dim. 3 hits. G3DSA:2.60.40.350. Flv_glyE_Ig-like. 1 hit. |
| Pfam | PF01003. Flavi_capsid. 1 hit. PF07652. Flavi_DEAD. 1 hit. PF02832. Flavi_glycop_C. 1 hit. PF00869. Flavi_glycoprot. 1 hit. PF01004. Flavi_M. 1 hit. PF00948. Flavi_NS1. 1 hit. PF01005. Flavi_NS2A. 1 hit. PF01002. Flavi_NS2B. 1 hit. PF01350. Flavi_NS4A. 1 hit. PF01349. Flavi_NS4B. 1 hit. PF00972. Flavi_NS5. 1 hit. PF01570. Flavi_propep. 1 hit. PF01728. FtsJ. 1 hit. PF00271. Helicase_C. 1 hit. PF00949. Peptidase_S7. 1 hit. [Graphical view] |
| PIRSF | PIRSF003817. Gen_Poly_FLV. 1 hit. |
| SMART | SM00487. DEXDc. 1 hit. SM00490. HELICc. 1 hit. [Graphical view] |
| SUPFAM | SSF56983. Flavi_glycoprotE. 1 hit. SSF81296. Ig_E-set. 1 hit. SSF50494. Pept_Ser_Cys. 1 hit. |
| PROSITE | PS51527. FLAVIVIRUS_NS2B. 1 hit. PS51528. FLAVIVIRUS_NS3PRO. 1 hit. PS51192. HELICASE_ATP_BIND_1. 1 hit. PS51194. HELICASE_CTER. 1 hit. PS50507. RDRP_SSRNA_POS. 1 hit. [Graphical view] |
| ProtoNet | Search... |
Entry information
| Entry name | POLG_DEN3C | ||||||||
| Accession | Primary (citable) accession number: Q99D35 | ||||||||
| Entry history |
| ||||||||
| Entry status | Reviewed (UniProtKB/Swiss-Prot) | ||||||||
| Annotation program | Viral Protein Annotation Program | ||||||||
Relevant documents
| Peptidase families Classification of peptidase families and list of entries |
| SIMILARITY comments Index of protein domains and families |

Clusters with