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Q9QNB1

- VP3_ROTHK

UniProt

Q9QNB1 - VP3_ROTHK

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Protein

Protein VP3

Gene
N/A
Organism
Rotavirus A (strain Human/Japan/KU/1995 G1-P1A[8]-I1-R1-C1-M1-A1-N1-T1-E1-H1) (RV-A)
Status
Reviewed - Annotation score: 3 out of 5- Experimental evidence at transcript leveli

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

  1. GTP binding Source: UniProtKB-KW
  2. mRNA (guanine-N7-)-methyltransferase activity Source: UniProtKB-EC
  3. mRNA guanylyltransferase activity Source: UniProtKB-EC
  4. RNA binding Source: UniProtKB-KW

GO - Biological processi

  1. viral process Source: InterPro
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 (strain Human/Japan/KU/1995 G1-P1A[8]-I1-R1-C1-M1-A1-N1-T1-E1-H1) (RV-A)
Taxonomic identifieri10952 [NCBI]
Taxonomic lineageiVirusesdsRNA virusesReoviridaeSedoreovirinaeRotavirusRotavirus A
Virus hostiHomo sapiens (Human) [TaxID: 9606]
ProteomesiUP000001458: Genome

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

  1. viral nucleocapsid Source: InterPro
Complete GO annotation...

Keywords - Cellular componenti

Virion

PTM / Processingi

Molecule processing

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Chaini1 – 835835Protein VP3PRO_0000368079Add
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.

Q9QNB1-1 [UniParc]FASTAAdd to Basket

« Hide

        10         20         30         40         50
MKVLALRHSV AQVYADTQTY LHDDSKDEYE NAFLISNLTA HNILYLNYSL
60 70 80 90 100
KTLKILNKSG IAAVETQSPD ELFALIRCNF TYDYENNIVY LHDYSYYTNN
110 120 130 140 150
EIRTDQHWIT KTDIIDYLLP GWKLTYVGYN GKNTRGHYNF SFSCQNAATD
160 170 180 190 200
DDIIVEYIYS NELDFQNFML RKIKERMTTS LPIARLSNRV FRDKLFPSIA
210 220 230 240 250
NMHKRVINVG PRNESMFTFL NFPTIKQFSN GAYIVKHTIK LKQEKWLGKR
260 270 280 290 300
VSQFDIGQYK NMLNVVTTIY YYYNLYHSKP IIYMLGSAPS YWIYNVKQYS
310 320 330 340 350
DFTFETWDPV DTPYSTTHHK ELFFDKDVMK LKDDSVLYID IRTDRKNMDW
360 370 380 390 400
KEWRKVVEQQ TVSNLNIAYN YLSTGKAKVC CVKLTAMDLE LPITAKLLHH
410 420 430 440 450
PTTEVRSEFY AILDVWDIIT IKRFIPKGVF YAFINNITTE NVFIQPPFKL
460 470 480 490 500
KASPTDYIVA LYALSNDFNS RQDVINLINK QKQSLITVRI NNTFKDEPKV
510 520 530 540 550
NFKNIYDWTF LPTDFELKDS VITSYDGCLG MFGLSLSLSS KPTGNNHLFI
560 570 580 590 600
INGTDKYYKL DQYANHMGIS RRSHQIRFSE SATSYSGYIF RDLSNNNFNL
610 620 630 640 650
IGTNVENSVS GHVYNALIYY RYNYAFDLKR WIYLHSIGKV AVEGGRYYEH
660 670 680 690 700
APIELIYACR SAREFAILQD DLTVLRYANE IEGYINKVYS ITYADDPNYF
710 720 730 740 750
IGITFNNIPY EYDVKVPHLT LGVLFISDNM IDEVVAVLKE MKTELFKTEI
760 770 780 790 800
STSYNYMLFD NVYVANASGV LSTYFKLYNM FYRNHITFGQ SRMFIPHITL
810 820 830
SFSNKRTIRI ESTRLKINSI YLRKIRGETV FDMSE
Length:835
Mass (Da):97,858
Last modified:May 1, 2000 - v1
Checksum:iEA5D8227C147E599
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AB022767 mRNA. Translation: BAA84964.1.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AB022767 mRNA. Translation: BAA84964.1 .

3D structure databases

ModBasei Search...
MobiDBi Search...

Protocols and materials databases

Structural Biology Knowledgebase Search...

Family and domain databases

InterProi IPR011181. VP3_Rotav.
[Graphical view ]
Pfami PF06929. Rotavirus_VP3. 1 hit.
[Graphical view ]
PIRSFi PIRSF004015. LigT_rotavirus. 1 hit.
PROSITEi PS51589. SAM_MT56_VP3. 1 hit.
[Graphical view ]
ProtoNeti Search...

Publicationsi

  1. Taniguchi K.
    Submitted (JAN-1999) to the EMBL/GenBank/DDBJ databases
    Cited for: NUCLEOTIDE SEQUENCE [MRNA].

Entry informationi

Entry nameiVP3_ROTHK
AccessioniPrimary (citable) accession number: Q9QNB1
Entry historyi
Integrated into UniProtKB/Swiss-Prot: April 14, 2009
Last sequence update: May 1, 2000
Last modified: October 1, 2014
This is version 35 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

Complete proteome, Multifunctional enzyme

Documents

  1. SIMILARITY comments
    Index of protein domains and families

External Data

Dasty 3