Reviewed,
UniProtKB/Swiss-Prot Q02597 (POLG_TUMVQ)
Last modified
January 19, 2010.
Version 91.
History...
Clusters with 100%,
90%,
50% identity |
Documents (2) |
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Names and origin
| Protein names | Recommended name: Genome polyprotein Cleaved into the following 10 chains: 1- Recommended name: P1 proteinase Alternative name(s): N-terminal protein 2- Recommended name: Helper component proteinase Short name=HC-pro EC=3.4.22.45 3- Recommended name: Protein P3 4- Recommended name: 6 kDa protein 1 Short name=6K1 5- Recommended name: Cytoplasmic inclusion protein Short name=CI EC=3.6.1.- 6- Recommended name: 6 kDa protein 2 Short name=6K2 7- Recommended name: Viral genome-linked protein Alternative name(s): VPg 8- Recommended name: Nuclear inclusion protein A Short name=NI-a Short name=NIa EC=3.4.22.44 Alternative name(s): NIa-pro 49 kDa proteinase Short name=49 kDa-Pro 9- Recommended name: Nuclear inclusion protein B Short name=NI-b Short name=NIb EC=2.7.7.48 Alternative name(s): RNA-directed RNA polymerase 10- Recommended name: Coat protein Short name=CP |
| Organism | Turnip mosaic virus (strain Quebec) (TuMV) [Complete proteome] |
| Taxonomic identifier | 36396 [NCBI] |
| Taxonomic lineage | Viruses › ssRNA positive-strand viruses, no DNA stage › Potyviridae › Potyvirus |
| Virus host | Brassica [TaxID: 3705] Capsella bursa-pastoris (Shepherd's purse) [TaxID: 3719] Stellaria media (Common chickweed) [TaxID: 13274] Calanthe [TaxID: 38206] Trifolium hybridum (Alsike clover) [TaxID: 74517] Alliaria [TaxID: 126269] Hesperis matronalis [TaxID: 264418] |
Protein attributes
| Sequence length | 3163 AA. |
| Sequence status | Complete. |
| Sequence processing | The displayed sequence is further processed into a mature form. |
| Protein existence | Evidence at protein level. |
General annotation (Comments)
| Function | Coat protein is involved in aphid transmission, cell-to-cell and systemis movement, encapsidation of the viral RNA and in the regulation of viral RNA amplification. Nuclear inclusion protein B is a RNA-dependent RNA polymerase that plays an essential role in the virus replication. Helper component proteinase is required for aphid transmission and also has proteolytic activity. Interacts with virions and aphid stylets. Acts as a suppressor of RNA-mediated gene silencing, also known as post-transcriptional gene silencing (PTGS), a mechanism of plant viral defense that limits the accumulation of viral RNAs. May have RNA-binding activity By similarity. Cytoplasmic inclusion protein has helicase activity. It may be involved in replication By similarity. Both 6K peptides are indispensable for virus replication By similarity. Nuclear inclusion protein A has RNA-binding and proteolytic activities. |
| Catalytic activity | Hydrolyzes glutaminyl bonds, and activity is further restricted by preferences for the amino acids in P6 - P1' that vary with the species of potyvirus, e.g. Glu-Xaa-Xaa-Tyr-Xaa-Gln-|-(Ser or Gly) for the enzyme from tobacco etch virus. The natural substrate is the viral polyprotein, but other proteins and oligopeptides containing the appropriate consensus sequence are also cleaved. Nucleoside triphosphate + RNA(n) = diphosphate + RNA(n+1). Hydrolyzes a Gly-|-Gly bond at its own C-terminus, commonly in the sequence -Tyr-Xaa-Val-Gly-|-Gly, in the processing of the potyviral polyprotein. |
| Subcellular location | Coat protein: Virion Potential. |
| Domain | The N-terminus of helper component proteinase is involved in interaction with stylets. The central part is involved in interaction with virions and the C-terminus is involved in cell-to cell movement of the virus. |
| Post-translational modification | VPg is uridylylated by the polymerase and is covalently attached to the 5'-end of the genomic RNA. This uridylylated form acts as a nucleotide-peptide primer for the polymerase By similarity. The viral RNA of potyviruses is expressed as a single polyprotein which undergoes post-translational proteolytic processing by the main proteinase NIa-pro resulting in the production of at least ten individual proteins. The P1 proteinase and the HC-pro cleave only their respective C-termini autocatalytically. 6K1 is essential for proper proteolytic separation of P3 from CI By similarity. |
| Sequence similarities | Belongs to the potyviruses polyprotein family. Contains 1 helicase ATP-binding domain. Contains 1 helicase C-terminal domain. Contains 1 peptidase C4 domain. Contains 1 peptidase C6 domain. Contains 1 peptidase S30 domain. Contains 1 RdRp catalytic domain. |
Ontologies
Alternative products
| This entry describes 2 isoforms produced by ribosomal frameshifting. [Align] [Select] Note: Knockout of PIPO ORF is lethal for the virus. Because of a common N-terminus, some results depicted for the genome polyprotein might belong to the PIPO isoform. | ||||||
| Isoform Genome polyprotein (identifier: Q02597-1) 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. | ||||||
| Note: Produced by conventional translation. | ||||||
| Isoform PIPO (identifier: Q02597-2) Also known as: Pretty interesting potyviridae ORF; The sequence of this isoform differs from the canonical sequence as follows: 982-1051: LEKSYLQILD...WSKQQAKGVK → GKKLSSADLG...EQTASKRSER 1052-3163: Missing. | ||||||
| Note: Produced by ribosomal frameshifting. |
Sequence annotation (Features)
| Feature key | Position(s) | Length | Description | Graphical view | Feature identifier | ||||
Molecule processing | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Chain | 1 – 362 | 362 | P1 proteinase Potential | PRO_0000040473 | |||||
| Chain | 363 – 820 | 458 | Helper component proteinase Potential | PRO_0000040474 | |||||
| Chain | 821 – 1175 | 355 | Protein P3 By similarity | PRO_0000040475 | |||||
| Chain | 1176 – 1227 | 52 | 6 kDa protein 1 By similarity | PRO_0000040476 | |||||
| Chain | 1228 – 1870 | 643 | Cytoplasmic inclusion protein By similarity | PRO_0000040477 | |||||
| Chain | 1871 – 1923 | 53 | 6 kDa protein 2 By similarity | PRO_0000040478 | |||||
| Chain | 1924 – 2115 | 192 | Viral genome-linked protein By similarity | PRO_0000040479 | |||||
| Chain | 2116 – 2358 | 243 | Nuclear inclusion protein A By similarity | PRO_0000040480 | |||||
| Chain | 2359 – 2875 | 517 | Nuclear inclusion protein B By similarity | PRO_0000040481 | |||||
| Chain | 2876 – 3163 | 288 | Coat protein By similarity | PRO_0000040482 | |||||
Regions | |||||||||
| Domain | 1300 – 1452 | 153 | Helicase ATP-binding | ||||||
| Domain | 1471 – 1630 | 160 | Helicase C-terminal | ||||||
| Domain | 2600 – 2724 | 125 | RdRp catalytic | ||||||
| Nucleotide binding | 1313 – 1320 | 8 | ATP Potential | ||||||
| Motif | 414 – 417 | 4 | Involved in interaction with stylet and aphid transmission By similarity | ||||||
| Motif | 672 – 674 | 3 | Involved in virions binding and aphid transmission By similarity | ||||||
| Motif | 1402 – 1405 | 4 | DECH box | ||||||
| Motif | 1964 – 1971 | 8 | Nuclear localization signal Potential | ||||||
Sites | |||||||||
| Active site | 270 | 1 | For P1 proteinase activity By similarity | ||||||
| Active site | 279 | 1 | For P1 proteinase activity Potential | ||||||
| Active site | 313 | 1 | For P1 proteinase activity By similarity | ||||||
| Active site | 706 | 1 | For helper component proteinase activity By similarity | ||||||
| Active site | 779 | 1 | For helper component proteinase activity By similarity | ||||||
| Active site | 2161 | 1 | For nuclear inclusion protein A activity By similarity | ||||||
| Active site | 2196 | 1 | For nuclear inclusion protein A activity By similarity | ||||||
| Active site | 2266 | 1 | For nuclear inclusion protein A activity By similarity | ||||||
| Site | 362 – 363 | 2 | Cleavage; by P1 proteinase Potential | ||||||
| Site | 820 – 821 | 2 | Cleavage; by HC-pro Potential | ||||||
| Site | 1175 – 1176 | 2 | Cleavage; by NIa-pro By similarity | ||||||
| Site | 1227 – 1228 | 2 | Cleavage; by NIa-pro By similarity | ||||||
| Site | 1870 – 1871 | 2 | Cleavage; by NIa-pro By similarity | ||||||
| Site | 2115 – 2116 | 2 | Cleavage; by NIa-pro By similarity | ||||||
| Site | 2358 – 2359 | 2 | Cleavage; by NIa-pro By similarity | ||||||
| Site | 2875 – 2876 | 2 | Cleavage; by NIa-pro By similarity | ||||||
Amino acid modifications | |||||||||
| Modified residue | 1986 | 1 | O-(5'-phospho-RNA)-tyrosine By similarity | ||||||
Natural variations | |||||||||
| Alternative sequence | 982 – 1051 | 70 | LEKSY…AKGVK → GKKLSSADLGRGMERVKLVG ALCYKILPVKASNLYTERFA NAKRSRFRRQIQRVGHILLR VEQTASKRSER in isoform PIPO. | VSP_034776 | |||||
| Alternative sequence | 1052 – 3163 | 2112 | Missing in isoform PIPO. | VSP_034777 | |||||
Experimental info | |||||||||
| Sequence conflict | 2862 | 1 | E → G in BAA01452. Ref.2 | ||||||
Sequences
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References
| [1] | "The complete nucleotide sequence of turnip mosaic potyvirus RNA." Nicolas O., Laliberte J.F. J. Gen. Virol. 73:2785-2793(1992) [PubMed: 1431807] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [GENOMIC RNA] (ISOFORM GENOME POLYPROTEIN). |
| [2] | "Sequence of the 3'-terminal region of turnip mosaic virus RNA and the capsid protein gene." Tremblay M.F., Nicolas O., Sinha R., Lazure C., Laliberte J.F. J. Gen. Virol. 71:2769-2772(1990) [PubMed: 2254757] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [GENOMIC RNA] OF 1534-3163 (ISOFORM GENOME POLYPROTEIN), PARTIAL PROTEIN SEQUENCE. |
| [3] | "An overlapping essential gene in the Potyviridae." Chung B.Y.-W., Miller W.A., Atkins J.F., Firth A.E. Proc. Natl. Acad. Sci. U.S.A. 105:5897-5902(2008) [PubMed: 18408156] [Abstract] Cited for: RIBOSOMAL FRAMESHIFT (ISOFORM PIPO). |
| [4] | "Potyvirus proteins: a wealth of functions." Urcuqui-Inchima S., Haenni A.L., Bernardi F. Virus Res. 74:157-175(2001) [PubMed: 11226583] [Abstract] Cited for: REVIEW. |
Cross-references
Sequence databases | |
|---|---|
| EMBL GenBank DDBJ | D10927 Genomic RNA. Translation: BAA01725.1. D10601 Genomic RNA. Translation: BAA01452.1. |
| PIR | JQ1895. |
3D structure databases | |
| SMR | Q02597. Positions 1305-1596, 1313-1673, 2124-2337. |
| ModBase | Search... |
Protein family/group databases | |
| MEROPS | C04.001. |
Family and domain databases | |
| InterPro | IPR014001. DEAD-like_N. IPR001650. DNA/RNA_helicase_C. IPR011545. DNA/RNA_helicase_DEAD/DEAH_N. IPR014021. Helicase_SF1/SF2_ATP-bd. IPR002540. Pept_S30_P1_potyvir. IPR001730. Peptidase_C4. IPR001456. Peptidase_C6. IPR001592. Poty_coat. IPR013648. PP_Potyviridae. IPR001205. RNA-dir_pol_picornavirus. IPR007094. RNA-dir_pol_PSvirus. IPR009003. Ser/Cys_Pept_Trypsin-like. [Graphical view] |
| Pfam | PF00270. DEAD. 1 hit. PF00271. Helicase_C. 1 hit. PF00863. Peptidase_C4. 1 hit. PF00851. Peptidase_C6. 1 hit. PF01577. Peptidase_S30. 1 hit. PF00767. Poty_coat. 1 hit. PF08440. Poty_PP. 1 hit. PF00680. RdRP_1. 1 hit. [Graphical view] |
| PRINTS | PR00966. NIAPOTYPTASE. |
| SMART | SM00487. DEXDc. 1 hit. SM00490. HELICc. 1 hit. [Graphical view] |
| PROSITE | 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_TUMVQ | ||||||||
| Accession | Primary (citable) accession number: Q02597 | ||||||||
| Entry history |
| ||||||||
| Entry status | Reviewed (UniProtKB/Swiss-Prot) | ||||||||
| Annotation project | Virus (Virus annotation project) | ||||||||
Relevant documents
| Peptidase families Classification of peptidase families and list of entries |
| SIMILARITY comments Index of protein domains and families |

Clusters with


