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Protein

Protein VP3

Gene
N/A
Organism
Rotavirus A (isolate Monkey/United States/TUCH/2003 G3-Px[24]-I9-R3-C3-M3-A9-Nx-Tx-Ex-Hx) (RV-A)
Status
Reviewed-Annotation score: Annotation score: 3 out of 5-Protein inferred from homologyi

Functioni

Multifunctional enzyme involved in mRNA capping. Catalyzes the formation of the 5' cap structure on the viral plus-strand transcripts. Specifically binds to GTP and displays guanylyltransferase and methyltransferase activities. Has affinity for ssRNA but not for dsRNA. Capping activity is non-specific and caps RNAs that initiate with either a G or an A residue. Together with VP1 polymerase, forms an enzyme complex positioned near the channels situated at each of the five-fold vertices of the core. Following infection, the outermost layer of the virus is lost, leaving a double-layered particle (DLP) made up of the core and VP6 shell. VP1 then catalyzes the transcription of fully conservative plus-strand genomic RNAs that are capped by VP3 and extruded through the DLP's channels into the cytoplasm where they function as mRNAs for translation of viral proteins. DLPs probably have an RNA triphosphatase activity as well, whereas open cores don't (By similarity).By similarity

Catalytic activityi

GTP + (5')pp-Pur-mRNA = diphosphate + G(5')ppp-Pur-mRNA.
S-adenosyl-L-methionine + G(5')pppR-RNA = S-adenosyl-L-homocysteine + m7G(5')pppR-RNA.

GO - Molecular functioni

GO - Biological processi

Complete GO annotation...

Keywords - Molecular functioni

Methyltransferase, Nucleotidyltransferase, Transferase

Keywords - Biological processi

mRNA capping, mRNA processing

Keywords - Ligandi

GTP-binding, Nucleotide-binding, RNA-binding, S-adenosyl-L-methionine

Names & Taxonomyi

Protein namesi
Recommended name:
Protein VP3
Including the following 2 domains:
mRNA guanylyltransferase (EC:2.7.7.50)
mRNA (guanine-N(7)-)-methyltransferase (EC:2.1.1.56)
OrganismiRotavirus A (isolate Monkey/United States/TUCH/2003 G3-Px[24]-I9-R3-C3-M3-A9-Nx-Tx-Ex-Hx) (RV-A)
Taxonomic identifieri444186 [NCBI]
Taxonomic lineageiVirusesdsRNA virusesReoviridaeSedoreovirinaeRotavirusRotavirus A
Virus hostiMacaca mulatta (Rhesus macaque) [TaxID: 9544]

Subcellular locationi

  • Virion Curated

  • Note: Attached inside the inner capsid as a minor component. Also found in spherical cytoplasmic structures, called virus factories, that appear early after infection and are the site of viral replication and packaging (Potential).Curated

GO - Cellular componenti

Complete GO annotation...

Keywords - Cellular componenti

Virion

PTM / Processingi

Molecule processing

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Chaini1 – 835835Protein VP3PRO_0000368071Add
BLAST

Interactioni

Subunit structurei

Interacts with VP1 (Potential). Interacts with VP2 (By similarity).By similarityCurated

Family & Domainsi

Compositional bias

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Compositional biasi270 – 2734Poly-Tyr

Sequence similaritiesi

Belongs to the rotavirus VP3 family.Curated

Family and domain databases

InterProiIPR011181. VP3_Rotav.
[Graphical view]
PfamiPF06929. Rotavirus_VP3. 1 hit.
[Graphical view]
PIRSFiPIRSF004015. LigT_rotavirus. 1 hit.
PROSITEiPS51589. SAM_MT56_VP3. 1 hit.
[Graphical view]

Sequencei

Sequence statusi: Complete.

B3F2X7-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MKVLALRHSV AQVYADTQVY THDDTKDNYE NAFLISNLTT HNILYLNYST
60 70 80 90 100
KTLEILNKSG IAAVEIQSLE ELFTLIRCNF TYDYENNIIY LHDYSYYTNN
110 120 130 140 150
EIRTDQHWVT KTDIEEYLLP GWKLTYVGYN GSDTRGHYNF SFTCQNAATD
160 170 180 190 200
DDLIIEYIYS EALDFQNFML KKIKERMTTS LPIARLSNRV FRDKLFPSLR
210 220 230 240 250
KKYQHIVNVG PRNESMFTFL NFPSIKQFSN GPYLVKDTIK LKQERWLGKR
260 270 280 290 300
VSQFDIGQYK NMMNVITTVY YYYNLYQKKP IIYMVGSAPS YWIYDVKQYS
310 320 330 340 350
DFTFETWDPL DTPYSSIHHK ELFFEKDVAK LRDNSILYID IRTDRRNADW
360 370 380 390 400
REWRKTVEEQ TISNLKLAYQ YLASGKSKVC CVKMTAMDLE LPISAKLLHH
410 420 430 440 450
PTTEIRSEFY LLLDIWDISN VKRFIPKGVL YSFINNIITE NVFIQPPFKI
460 470 480 490 500
KTSKNEYIVA LYALSNDFND RMNVINLINN QKQSLITVRI NNTFKDEPKV
510 520 530 540 550
GFKNIYDWTF LPTDFNTTDS IITSYDGCLG IFGLSISLAS KPTGNNHLFI
560 570 580 590 600
LNGTDKYYKL DQFANHTGIS RRSHQIRFSE SATSYSGYIF RDLSNNNFNL
610 620 630 640 650
IGTNIENSVS GHVYNALIYY RYNYSFDLKR WIYLHSIEKA DIEGGKYYEH
660 670 680 690 700
APIELIYACR SAKEFALLQD DLTVLRYANE IERYIHKVYS ITYADDPNYF
710 720 730 740 750
IGIKFKHIPY KYDVKIPHLT FGVLFISDNM IPDVTRIIKD MKKELFEMDV
760 770 780 790 800
TTSYTYMLSD GTYVANISGV LSTYFKMYNL FYKNQITFGQ SRMFIPHITL
810 820 830
SFSSRKTVRI ETVKLKIDSI YLRKIRGDTV FDMSE
Length:835
Mass (Da):98,256
Last modified:July 22, 2008 - v1
Checksum:iC3BCE50CA7536983
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
EF583012 Genomic RNA. Translation: ABQ59574.1.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
EF583012 Genomic RNA. Translation: ABQ59574.1.

3D structure databases

ModBaseiSearch...
MobiDBiSearch...

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Family and domain databases

InterProiIPR011181. VP3_Rotav.
[Graphical view]
PfamiPF06929. Rotavirus_VP3. 1 hit.
[Graphical view]
PIRSFiPIRSF004015. LigT_rotavirus. 1 hit.
PROSITEiPS51589. SAM_MT56_VP3. 1 hit.
[Graphical view]
ProtoNetiSearch...

Publicationsi

  1. Brown T.L., Yang H., Patton J.T.
    Submitted (APR-2007) to the EMBL/GenBank/DDBJ databases
    Cited for: NUCLEOTIDE SEQUENCE [GENOMIC RNA].

Entry informationi

Entry nameiVP3_ROTTU
AccessioniPrimary (citable) accession number: B3F2X7
Entry historyi
Integrated into UniProtKB/Swiss-Prot: April 14, 2009
Last sequence update: July 22, 2008
Last modified: October 1, 2014
This is version 19 of the entry and version 1 of the sequence. [Complete history]
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programViral Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

Multifunctional enzyme

Documents

  1. SIMILARITY comments
    Index of protein domains and families

External Data

Dasty 3

Similar proteinsi

Links to similar proteins from the UniProt Reference Clusters (UniRef) at 100%, 90% and 50% sequence identity:
100%UniRef100 combines identical sequences and sub-fragments with 11 or more residues from any organism into Uniref entry.
90%UniRef90 is built by clustering UniRef100 sequences that have at least 90% sequence identity to, and 80% overlap with, the longest sequence (a.k.a seed sequence).
50%UniRef50 is built by clustering UniRef90 seed sequences that have at least 50% sequence identity to, and 80% overlap with, the longest sequence in the cluster.