UniProtKB - Q703G9 (POLS_IPNVS)
Structural polyprotein
Functioni
Capsid protein VP2 self assembles to form an icosahedral capsid with a T=13 symmetry, about 70 nm in diameter, and consisting of 260 VP2 trimers. The capsid encapsulates the genomic dsRNA. VP2 is also involved in attachment and entry into the host cell (By similarity).
By similarityThe precursor of VP2 plays an important role in capsid assembly. First, pre-VP2 and VP2 oligomers assemble to form a procapsid. Then, the pre-VP2 intermediates may be processed into VP2 proteins by proteolytic cleavage mediated by VP4 to obtain the mature virion. The final capsid is composed of pentamers and hexamers but VP2 has a natural tendency to assemble into all-pentameric structures. Therefore pre-VP2 may be required to allow formation of the hexameric structures (By similarity).
By similarityProtease VP4 is a serine protease that cleaves the polyprotein into its final products. Pre-VP2 is first partially cleaved, and may be completely processed by VP4 upon capsid maturation.
PROSITE-ProRule annotationCapsid protein VP3 plays a key role in virion assembly by providing a scaffold for the capsid made of VP2. May self-assemble to form a T=4-like icosahedral inner-capsid composed of at least 180 trimers. Plays a role in genomic RNA packaging by recruiting VP1 into the capsid and interacting with the dsRNA genome segments to form a ribonucleoprotein complex. Additionally, the interaction of the VP3 C-terminal tail with VP1 removes the inherent structural blockade of the polymerase active site. Thus, VP3 can also function as a transcriptional activator (By similarity).
By similarityStructural peptide 1 is a small peptide derived from pre-VP2 C-terminus. It destabilizes and perforates cell membranes, suggesting a role during entry (By similarity).
By similarityStructural peptide 2 is a small peptide derived from pVP2 C-terminus. It is not essential for the virus viability, but viral growth is affected when missing (By similarity).
By similarityStructural peptide 3 is a small peptide derived from pVP2 C-terminus. It is not essential for the virus viability, but viral growth is affected when missing (By similarity).
By similarityMiscellaneous
Sites
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Metal bindingi | 26 | Divalent metal cation; shared with trimeric partnersBy similarity | 1 | |
Active sitei | 633 | NucleophilePROSITE-ProRule annotation1 Publication | 1 | |
Active sitei | 674 | PROSITE-ProRule annotation1 Publication | 1 |
GO - Molecular functioni
- metal ion binding Source: UniProtKB-KW
- serine-type peptidase activity Source: UniProtKB-KW
- structural molecule activity Source: InterPro
Keywordsi
Molecular function | Hydrolase, Protease, Serine protease |
Ligand | Metal-binding |
Enzyme and pathway databases
BRENDAi | 3.4.21.115, 6986 |
Protein family/group databases
MEROPSi | S50.001 |
Names & Taxonomyi
Protein namesi | Recommended name: Structural polyproteinShort name: PP Cleaved into the following 7 chains: Protease VP4 (EC:3.4.21.-) Alternative name(s): Non-structural protein VP4 Short name: NS |
Organismi | Infectious pancreatic necrosis virus (strain Sp) (IPNV) |
Taxonomic identifieri | 11005 [NCBI] |
Taxonomic lineagei | Viruses › Riboviria › Orthornavirae › Birnaviridae › Aquabirnavirus › |
Virus hosti | Oncorhynchus mykiss (Rainbow trout) (Salmo gairdneri) [TaxID: 8022] Salmo [TaxID: 8028] |
Proteomesi |
|
Subcellular locationi
- Virion Curated
- Host cytoplasm Curated
- Virion Curated
- Host cytoplasm Curated
- Virion Curated
- Host cytoplasm Curated
- Virion Curated
- Host cytoplasm Curated
- Virion Curated
- Host cytoplasm Curated
Keywords - Cellular componenti
Capsid protein, Host cytoplasm, VirionPathology & Biotechi
Mutagenesis
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Mutagenesisi | 508 – 509 | AS → QL: Complete loss of pVP2-VP4 cleavage. 1 Publication | 2 | |
Mutagenesisi | 547 | H → S: Strongly reduced VP4-VP3 cleavage. No effect on pVP2-VP4 cleavage. 1 Publication | 1 | |
Mutagenesisi | 573 | D → Q: No effect on polyprotein processing. 1 Publication | 1 | |
Mutagenesisi | 585 | D → I: No effect on polyprotein processing. 1 Publication | 1 | |
Mutagenesisi | 595 | D → L: No effect on polyprotein processing. 1 Publication | 1 | |
Mutagenesisi | 601 | D → S: No effect on polyprotein processing. 1 Publication | 1 | |
Mutagenesisi | 633 | S → A, Q or T: Complete loss of protease activity. 1 Publication | 1 | |
Mutagenesisi | 633 | S → C: Partial loss of protease activity. 1 Publication | 1 | |
Mutagenesisi | 644 | D → I: No effect on polyprotein processing. 1 Publication | 1 | |
Mutagenesisi | 660 – 661 | DD → GS: No effect on polyprotein processing. 1 Publication | 2 | |
Mutagenesisi | 672 | D → N: No effect on polyprotein processing. 1 Publication | 1 | |
Mutagenesisi | 674 | K → A, D, H, Q or R: Complete loss of protease activity. 1 Publication | 1 | |
Mutagenesisi | 675 | A → D: 60% loss of pVP2-VP4 and VP4-VP3 cleavages. 1 Publication | 1 | |
Mutagenesisi | 676 | I → A: No effect on polyprotein processing. 1 Publication | 1 | |
Mutagenesisi | 677 | A → D: 60% loss of pVP2-VP4. Complete loss of VP4-VP3 cleavage. 1 Publication | 1 | |
Mutagenesisi | 678 | A → S: No effect on polyprotein processing. 1 Publication | 1 | |
Mutagenesisi | 679 | H → L: Strongly reduced VP4-VP3 cleavage. No effect on pVP2-VP4 cleavage. 1 Publication | 1 | |
Mutagenesisi | 680 | E → M: No effect on polyprotein processing. 1 Publication | 1 | |
Mutagenesisi | 682 | G → L: No effect on polyprotein processing. 1 Publication | 1 | |
Mutagenesisi | 683 | L → A: 60% loss of pVP2-VP4 and VP4-VP3 cleavages. 1 Publication | 1 | |
Mutagenesisi | 684 | P → Q: No effect on polyprotein processing. 1 Publication | 1 | |
Mutagenesisi | 685 | L → A: 60% loss of pVP2-VP4 and VP4-VP3 cleavages. 1 Publication | 1 | |
Mutagenesisi | 686 | I → A: 20% loss of pVP2-VP4 and VP4-VP3 cleavages. 1 Publication | 1 | |
Mutagenesisi | 687 | G → A: 20% loss of pVP2-VP4 and VP4-VP3 cleavages. 1 Publication | 1 | |
Mutagenesisi | 689 | Q → I: No effect on polyprotein processing. 1 Publication | 1 | |
Mutagenesisi | 693 | D → L: Strongly reduced VP4-VP3 cleavage. No effect on pVP2-VP4 cleavage. 1 Publication | 1 | |
Mutagenesisi | 704 | H → S: No effect on polyprotein processing. 1 Publication | 1 | |
Mutagenesisi | 734 – 735 | AS → LE: Complete loss of VP4-VP3 cleavage. 1 Publication | 2 |
PTM / Processingi
Molecule processing
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
ChainiPRO_0000392599 | 1 – 508 | Precursor of VP2Add BLAST | 508 | |
ChainiPRO_0000227873 | 1 – 442 | Capsid protein VP2Add BLAST | 442 | |
PeptideiPRO_0000227874 | 443 – 486 | Structural peptide 11 PublicationAdd BLAST | 44 | |
PeptideiPRO_0000227875 | 487 – 495 | Structural peptide 21 Publication | 9 | |
PeptideiPRO_0000227876 | 496 – 508 | Structural peptide 31 PublicationAdd BLAST | 13 | |
ChainiPRO_0000227877 | 509 – 734 | Protease VP4Add BLAST | 226 | |
ChainiPRO_0000227878 | 735 – 972 | Capsid protein VP3Add BLAST | 238 |
Post-translational modificationi
Sites
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Sitei | 442 – 443 | Cleavage; by protease VP4 | 2 | |
Sitei | 486 – 487 | Cleavage; by protease VP4 | 2 | |
Sitei | 495 – 496 | Cleavage; by protease VP4 | 2 | |
Sitei | 508 – 509 | Cleavage; by protease VP4 | 2 | |
Sitei | 715 – 716 | Cleavage; by protease VP4; subsidiary | 2 | |
Sitei | 734 – 735 | Cleavage; by protease VP4 | 2 |
Proteomic databases
PRIDEi | Q703G9 |
Interactioni
Subunit structurei
Capsid protein VP2 is a homotrimer. A central divalent metal stabilizes the VP2 trimer, possibly cobalt (By similarity). Capsid protein VP3 is a homodimer. Capsid protein VP3 interacts (via C-terminus) with VP1 in the cytoplasm Capsid VP3 interacts with VP2 (By similarity).
By similarityStructurei
Secondary structure
3D structure databases
SMRi | Q703G9 |
ModBasei | Search... |
PDBe-KBi | Search... |
Miscellaneous databases
EvolutionaryTracei | Q703G9 |
Family & Domainsi
Domains and Repeats
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Domaini | 509 – 734 | Peptidase S50PROSITE-ProRule annotationAdd BLAST | 226 |
Region
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Regioni | 794 – 817 | DisorderedSequence analysisAdd BLAST | 24 | |
Regioni | 916 – 972 | DisorderedSequence analysisAdd BLAST | 57 |
Compositional bias
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Compositional biasi | 798 – 817 | Basic and acidic residuesSequence analysisAdd BLAST | 20 | |
Compositional biasi | 924 – 948 | Basic and acidic residuesSequence analysisAdd BLAST | 25 |
Family and domain databases
Gene3Di | 1.10.150.620, 1 hit 1.10.8.880, 1 hit 2.60.120.20, 1 hit |
InterProi | View protein in InterPro IPR002662, Birna_VP2 IPR002663, Birna_VP3 IPR043048, Birna_VP3_dom1 IPR043049, Birna_VP3_dom2 IPR025775, Birna_VP4_Prtase_dom IPR029053, Viral_coat |
Pfami | View protein in Pfam PF01766, Birna_VP2, 1 hit PF01767, Birna_VP3, 1 hit PF01768, Birna_VP4, 1 hit |
PROSITEi | View protein in PROSITE PS51548, BIRNAVIRUS_VP4_PRO, 1 hit |
i Sequence
Sequence statusi: Complete.
: The displayed sequence is further processed into a mature form. Sequence processingi
10 20 30 40 50
MNTNKATATY LKSIMLPETG PASIPDDITE RHILKQETSS YNLEVSESGS
60 70 80 90 100
GVLVCFPGAP GSRIGAHYRW NANQTGLEFD QWLETSQDLK KAFNYGRLIS
110 120 130 140 150
RKYDIQSSTL PAGLYALNGT LNAATFEGSL SEVESLTYNS LMSLTTNPQD
160 170 180 190 200
KVNNQLVTKG VTVLNLPTGF DKPYVRLEDE TPQGLQSMNG AKMRCTAAIA
210 220 230 240 250
PRRYEIDLPS QRLPPVPATG TLTTLYEGNA DIVNSTTVTG DINFSLAEQP
260 270 280 290 300
ADETKFDFQL DFMGLDNDVP VVTVVSSVLA TNDNYRGVSA KMTQSIPTEN
310 320 330 340 350
ITKPITRVKL SYKINQQTAI GNVATLGTMG PASVSFSSGN GNVPGVLRPI
360 370 380 390 400
TLVAYEKMTP LSILTVAGVS NYELIPNPEL LKNMVTRYGK YDPEGLNYAK
410 420 430 440 450
MILSHREELD IRTVWRTEEY KERTRVFNEI TDFSSDLPTS KAWGWRDIVR
460 470 480 490 500
GIRKVAAPVL STLFPMAAPL IGMADQFIGD LTKTNAAGGR YHSMAAGGRY
510 520 530 540 550
KDVLESWASG GPDGKFSRAL KNRLESANYE EVELPPPSKG VIVPVVHTVK
560 570 580 590 600
SAPGEAFGSL AIIIPGEYPE LLDANQQVLS HFANDTGSVW GIGEDIPFEG
610 620 630 640 650
DNMCYTALPL KEIKRNGNIV VEKIFAGPIM GPSAQLGLSL LVNDIEDGVP
660 670 680 690 700
RMVFTGEIAD DEETIIPICG VDIKAIAAHE QGLPLIGNQP GVDEEVRNTS
710 720 730 740 750
LAAHLIQTGT LPVQRAKGSN KRIKYLGELM ASNASGMDEE LQRLLNATMA
760 770 780 790 800
RAKEVQDAEI YKLLKLMAWT RKNDLTDHMY EWSKEDPDAL KFGKLISTPP
810 820 830 840 850
KHPEKPKGPD QHHAQEARAT RISLDAVRAG ADFATPEWVA LNNYRGPSPG
860 870 880 890 900
QFKYYLITGR EPEPGDEYED YIKQPIVKPT DMNKIRRLAN SVYGLPHQEP
910 920 930 940 950
APEEFYDAVA AVFAQNGGRG PDQDQMQDLR ELARQMKRRP RNADAPRRTR
960 970
APAEPAPPGR SRFTPSGDNA EV
Experimental Info
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Sequence conflicti | 883 | N → Y in AAR10446 (PubMed:15584407).Curated | 1 |
Natural variant
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Natural varianti | 36 | Q → P in strain: Isolate Mason. | 1 | |
Natural varianti | 46 | S → P in strain: Isolate Mason. | 1 | |
Natural varianti | 52 | V → I in strain: Isolate Mason, Isolate Tseng, Isolate Blake, Isolate Sp103, Isolate Sp116, Isolate Sp122, Isolate NVI-001, Isolate NVI-011, Isolate NVI-013, Isolate NVI-015, Isolate NVI-016, Isolate NVI-020 and NVI-023. | 1 | |
Natural varianti | 54 | V → I in strain: Isolate NVI-010. | 1 | |
Natural varianti | 82 – 85 | WLET → CWRA in strain: Isolate Mason. | 4 | |
Natural varianti | 152 | V → A in strain: Isolate Mason, Isolate Blake and Isolate Tseng. | 1 | |
Natural varianti | 192 | K → R in strain: Isolate Mason, Isolate Blake and Isolate Tseng. | 1 | |
Natural varianti | 199 | I → T in strain: Isolate Sp103 and Isolate Sp122. | 1 | |
Natural varianti | 212 | R → S in strain: Isolate Mason, Isolate Blake and Isolate Tseng. | 1 | |
Natural varianti | 217 | P → T in strain: Isolate Sp122, Isolate NVI-001, Isolate NVI-011, Isolate NVI-013, Isolate NVI-015, Isolate NVI-020 and Isolate NVI-023. | 1 | |
Natural varianti | 219 | T → I in strain: Isolate NVI-010. | 1 | |
Natural varianti | 221 | T → A in strain: Isolate NVI-001, Isolate NVI-013, Isolate NVI-015, Isolate Sp116 and Isolate NVI-023. | 1 | |
Natural varianti | 222 | L → P in strain: Isolate NVI-011. | 1 | |
Natural varianti | 234 | N → S in strain: Isolate Tseng. | 1 | |
Natural varianti | 247 | A → T in strain: Isolate Sp122, Isolate NVI-001, Isolate NVI-013, Isolate NVI-015 and Isolate NVI-023. | 1 | |
Natural varianti | 249 | Q → R in strain: Isolate Tseng. | 1 | |
Natural varianti | 252 | D → N in strain: Isolate Mason, Isolate Tseng, Isolate Blake, Isolate Sp103, Isolate NVI-010 and Isolate NVI-016. | 1 | |
Natural varianti | 252 | D → V in strain: Isolate NVI-001, Isolate NVI-011, Isolate NVI-013, Isolate NVI-015, Isolate NVI-020, Isolate NVI-023, Isolate Sp116 and Isolate Sp122. | 1 | |
Natural varianti | 255 | K → R in strain: Isolate Mason, Isolate Blake and Isolate Tseng. | 1 | |
Natural varianti | 262 | F → L in strain: Isolate Mason. | 1 | |
Natural varianti | 288 | V → A in strain: Isolate Sp116. | 1 | |
Natural varianti | 319 | A → E in strain: Isolate NVI-016. | 1 | |
Natural varianti | 323 | V → A in strain: Isolate NVI-020. | 1 | |
Natural varianti | 323 | V → F in strain: Isolate NVI-016. | 1 | |
Natural varianti | 432 – 434 | DFS → EKT in strain: Isolate Mason. | 3 | |
Natural varianti | 455 | V → I in strain: Isolate Mason. | 1 | |
Natural varianti | 473 | M → T in strain: Isolate Mason, Isolate Heppel and Isolate Blake. | 1 | |
Natural varianti | 500 | Y → H in strain: Isolate Heppel, Isolate NVI-010, Isolate NVI-011, Isolate NVI-020, Isolate Sp103 and Isolate Sp116. | 1 | |
Natural varianti | 565 | P → R in strain: Isolate Mason. | 1 | |
Natural varianti | 570 – 571 | EL → SF in strain: Isolate Mason. | 2 | |
Natural varianti | 672 | D → A in strain: Isolate NVI-016. | 1 | |
Natural varianti | 717 | K → Q in strain: Isolate NVI-016. | 1 | |
Natural varianti | 788 | D → G in strain: Isolate NVI-011. | 1 | |
Natural varianti | 788 | D → Y in strain: Isolate NVI-001. | 1 | |
Natural varianti | 802 | H → R in strain: Isolate NVI-015 and Isolate NVI-016. | 1 | |
Natural varianti | 841 | L → M in strain: Isolate NVI-016. | 1 | |
Natural varianti | 867 | E → Q in strain: Isolate Mason and Isolate Blake. | 1 | |
Natural varianti | 875 | P → S in strain: Isolate NVI-016. | 1 | |
Natural varianti | 882 | M → T in strain: Isolate Tseng. | 1 | |
Natural varianti | 953 – 954 | AE → GK in strain: Isolate Mason. | 2 | |
Natural varianti | 959 – 960 | GR → DV in strain: Isolate Mason. | 2 | |
Natural varianti | 968 | D → N in strain: Isolate Sp116. | 1 |
Sequence databases
Select the link destinations: EMBLi GenBanki DDBJi Links Updated | AJ622822 Genomic RNA Translation: CAF22217.1 U48225 Genomic RNA Translation: AAD11535.1 U56907 Genomic RNA Translation: AAB39512.1 AY374435 Genomic RNA Translation: AAQ75364.1 AY379735 Genomic RNA Translation: AAQ75348.1 AY379736 Genomic RNA Translation: AAQ75350.1 AY379737 Genomic RNA Translation: AAQ75352.1 AY379738 Genomic RNA Translation: AAQ75354.1 AY379740 Genomic RNA Translation: AAQ75357.1 AY379742 Genomic RNA Translation: AAQ75360.1 AY379744 Genomic RNA Translation: AAQ75363.1 AY354519 Genomic RNA Translation: AAR10446.1 AY354520 Genomic RNA Translation: AAR10449.1 AY354521 Genomic RNA Translation: AAR10452.1 AY823632 Genomic RNA Translation: AAX24140.1 AF342728 mRNA Translation: AAK32154.1 L13988 Genomic RNA Translation: AAB00986.1 |
Similar proteinsi
Cross-referencesi
Sequence databases
Select the link destinations: EMBLi GenBanki DDBJi Links Updated | AJ622822 Genomic RNA Translation: CAF22217.1 U48225 Genomic RNA Translation: AAD11535.1 U56907 Genomic RNA Translation: AAB39512.1 AY374435 Genomic RNA Translation: AAQ75364.1 AY379735 Genomic RNA Translation: AAQ75348.1 AY379736 Genomic RNA Translation: AAQ75350.1 AY379737 Genomic RNA Translation: AAQ75352.1 AY379738 Genomic RNA Translation: AAQ75354.1 AY379740 Genomic RNA Translation: AAQ75357.1 AY379742 Genomic RNA Translation: AAQ75360.1 AY379744 Genomic RNA Translation: AAQ75363.1 AY354519 Genomic RNA Translation: AAR10446.1 AY354520 Genomic RNA Translation: AAR10449.1 AY354521 Genomic RNA Translation: AAR10452.1 AY823632 Genomic RNA Translation: AAX24140.1 AF342728 mRNA Translation: AAK32154.1 L13988 Genomic RNA Translation: AAB00986.1 |
3D structure databases
Select the link destinations: PDBei RCSB PDBi PDBji Links Updated | PDB entry | Method | Resolution (Å) | Chain | Positions | PDBsum |
2PNL | X-ray | 2.21 | A/B/C/D/E/F/G/H/I/J | 514-716 | [»] | |
2PNM | X-ray | 2.30 | A | 524-716 | [»] | |
3IDE | X-ray | 3.35 | A/B/C/D/E | 1-442 | [»] | |
SMRi | Q703G9 | |||||
ModBasei | Search... | |||||
PDBe-KBi | Search... |
Protein family/group databases
MEROPSi | S50.001 |
Proteomic databases
PRIDEi | Q703G9 |
Enzyme and pathway databases
BRENDAi | 3.4.21.115, 6986 |
Miscellaneous databases
EvolutionaryTracei | Q703G9 |
Family and domain databases
Gene3Di | 1.10.150.620, 1 hit 1.10.8.880, 1 hit 2.60.120.20, 1 hit |
InterProi | View protein in InterPro IPR002662, Birna_VP2 IPR002663, Birna_VP3 IPR043048, Birna_VP3_dom1 IPR043049, Birna_VP3_dom2 IPR025775, Birna_VP4_Prtase_dom IPR029053, Viral_coat |
Pfami | View protein in Pfam PF01766, Birna_VP2, 1 hit PF01767, Birna_VP3, 1 hit PF01768, Birna_VP4, 1 hit |
PROSITEi | View protein in PROSITE PS51548, BIRNAVIRUS_VP4_PRO, 1 hit |
MobiDBi | Search... |
Entry informationi
Entry namei | POLS_IPNVS | |
Accessioni | Q703G9Primary (citable) accession number: Q703G9 Secondary accession number(s): P90205 Q9YJV0 | |
Entry historyi | Integrated into UniProtKB/Swiss-Prot: | March 21, 2006 |
Last sequence update: | July 5, 2004 | |
Last modified: | June 2, 2021 | |
This is version 76 of the entry and version 1 of the sequence. See complete history. | ||
Entry statusi | Reviewed (UniProtKB/Swiss-Prot) | |
Annotation program | Viral Protein Annotation Program |
Miscellaneousi
Keywords - Technical termi
3D-structure, Direct protein sequencing, Reference proteomeDocuments
- PDB cross-references
Index of Protein Data Bank (PDB) cross-references