UniProtKB - Q76ZT1 (MCE_VACCA)
Protein
Cap-specific mRNA (nucleoside-2'-O-)-methyltransferase
Gene
PAPS
Organism
Vaccinia virus (strain Ankara) (VACV)
Status
Functioni
Displays methyltransferase, positive regulation of the poly(A) polymerase and transcription elongation activities. Involved in the modification of both mRNA ends and in intermediate and late gene positive transcription elongation. At the mRNAs 5' end, methylates the ribose 2' OH group of the first transcribed nucleotide, thereby producing a 2'-O-methylpurine cap. At the 3' end, functions as a processivity factor which stimulates the activity of the viral poly(A) polymerase VP55 that creates mRNA's poly(A) tail. In the presence of VP39, VP55 does not dissociate from the RNA allowing tail elongation to around 250 adenylates.By similarity
Catalytic activityi
- a 5'-end (N7-methyl 5'-triphosphoguanosine)-guanosine in mRNA + S-adenosyl-L-methionine = a 5'-end (N7-methyl 5'-triphosphoguanosine)-(2'-O-methyl-guanosine) in mRNA + H+ + S-adenosyl-L-homocysteineEC:2.1.1.57
- a 5'-end (N7-methyl 5'-triphosphoguanosine)-adenosine in mRNA + S-adenosyl-L-methionine = a 5'-end (N7-methyl 5'-triphosphoguanosine)-(2'-O-methyl-adenosine) in mRNA + H+ + S-adenosyl-L-homocysteineEC:2.1.1.57
Sites
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Binding sitei | 22 | mRNA capPROSITE-ProRule annotation | 1 | |
Binding sitei | 39 | S-adenosyl-L-methioninePROSITE-ProRule annotation | 1 | |
Binding sitei | 66 | S-adenosyl-L-methioninePROSITE-ProRule annotation | 1 | |
Binding sitei | 68 | S-adenosyl-L-methionine; via carbonyl oxygenPROSITE-ProRule annotation | 1 | |
Binding sitei | 72 | S-adenosyl-L-methionine; via amide nitrogenPROSITE-ProRule annotation | 1 | |
Binding sitei | 95 | S-adenosyl-L-methioninePROSITE-ProRule annotation | 1 | |
Binding sitei | 97 | S-adenosyl-L-methioninePROSITE-ProRule annotation | 1 | |
Binding sitei | 116 | S-adenosyl-L-methionine; via amide nitrogen and carbonyl oxygenPROSITE-ProRule annotation | 1 | |
Binding sitei | 138 | S-adenosyl-L-methioninePROSITE-ProRule annotation | 1 | |
Active sitei | 175 | For methyltransferase activityPROSITE-ProRule annotation | 1 | |
Binding sitei | 182 | mRNA capPROSITE-ProRule annotation | 1 | |
Binding sitei | 233 | mRNA capPROSITE-ProRule annotation | 1 |
GO - Molecular functioni
- mRNA (nucleoside-2'-O-)-methyltransferase activity Source: UniProtKB-EC
- translation elongation factor activity Source: UniProtKB-KW
GO - Biological processi
- 7-methylguanosine mRNA capping Source: UniProtKB-KW
- regulation of mRNA 3'-end processing Source: InterPro
Keywordsi
Molecular function | Elongation factor, Methyltransferase, Transferase |
Biological process | mRNA capping, mRNA processing, Protein biosynthesis, Transcription |
Ligand | S-adenosyl-L-methionine |
Names & Taxonomyi
Protein namesi | Recommended name: Cap-specific mRNA (nucleoside-2'-O-)-methyltransferase (EC:2.1.1.57)Alternative name(s): Poly(A) polymerase regulatory subunit Poly(A) polymerase small subunit Short name: PAP-S VP39 |
Gene namesi | Name:PAPS Ordered Locus Names:MVA087R, ACAM3000_MVA_087 |
Organismi | Vaccinia virus (strain Ankara) (VACV) |
Taxonomic identifieri | 126794 [NCBI] |
Taxonomic lineagei | Viruses › Varidnaviria › Bamfordvirae › Nucleocytoviricota › Pokkesviricetes › Chitovirales › Poxviridae › Chordopoxvirinae › Orthopoxvirus › Vaccinia virus |
Virus hosti | Homo sapiens (Human) [TaxID: 9606] |
Proteomesi |
|
PTM / Processingi
Molecule processing
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
ChainiPRO_0000099110 | 1 – 333 | Cap-specific mRNA (nucleoside-2'-O-)-methyltransferaseAdd BLAST | 333 |
Interactioni
Subunit structurei
Methyltransferase activity: Monomer, poly(A) polymerase activity: Heterodimer composed of a catalytic component, VP55, and a processivity factor, VP39.
Interacts with Rap94 and NPH-I; these interactions might help linking transcription to capping and polyadenylation.
By similarityFamily & Domainsi
Region
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Regioni | 169 – 333 | Binding to Rap94By similarityAdd BLAST | 165 | |
Regioni | 169 – 249 | Binding to NPH-IPROSITE-ProRule annotationAdd BLAST | 81 | |
Regioni | 177 – 180 | mRNA cap bindingPROSITE-ProRule annotation | 4 | |
Regioni | 205 – 207 | mRNA cap bindingPROSITE-ProRule annotation | 3 |
Sequence similaritiesi
Belongs to the class I-like SAM-binding methyltransferase superfamily. Poxvirus/kinetoplastid 2'-O-MTase family.PROSITE-ProRule annotation
Family and domain databases
CDDi | cd20756, capping_2-OMTase_Poxviridae, 1 hit |
InterProi | View protein in InterPro IPR000176, mRNA_MeTrfase-like IPR025804, Pox/kineto_cap_MeTfrase IPR030375, Poxvir_cap_MeTfrase IPR029063, SAM-dependent_MTases |
Pfami | View protein in Pfam PF01358, PARP_regulatory, 1 hit |
PIRSFi | PIRSF003726, PolA_polym_reg_poxV, 1 hit |
SUPFAMi | SSF53335, SSF53335, 1 hit |
PROSITEi | View protein in PROSITE PS51612, SAM_MT_2O_PK, 1 hit |
i Sequence
Sequence statusi: Complete.
Q76ZT1-1 [UniParc]FASTAAdd to basket
10 20 30 40 50
MDVVSLDKPF MYFEEIDNEL DYEPESANEV AKKLPYQGQL KLLLGELFFL
60 70 80 90 100
SKLQRHGILD GATVVYIGSA PGTHIRYLRD HFYNLGVIIK WMLIDGRHHD
110 120 130 140 150
PILNGLRDVT LVTRFVDEEY LRSIKKQLHP SKIILISDVR SKRGGNEPST
160 170 180 190 200
ADLLSNYALQ NVMISILNPV ASSLKWRCPF PDQWIKDFYI PHGNKMLQPF
210 220 230 240 250
APSYSAEMRL LSIYTGENMR LTRVTKSDAV NYEKKMYYLN KIVRNKVVVN
260 270 280 290 300
FDYPNQEYDY FHMYFMLRTV YCNKTFPTTK AKVLFLQQSI FRFLNIPTTS
310 320 330
TEKVSHEPIQ RKISSKNSMS KNRNSKRSVR SNK
Sequence databases
Select the link destinations: EMBLi GenBanki DDBJi Links Updated | U94848 Genomic DNA Translation: AAB96504.1 AY603355 Genomic DNA Translation: AAT10485.1 |
RefSeqi | YP_232977.1, NC_006998.1 |
Genome annotation databases
GeneIDi | 3707551 |
KEGGi | vg:3707551 |
Similar proteinsi
Cross-referencesi
Sequence databases
Select the link destinations: EMBLi GenBanki DDBJi Links Updated | U94848 Genomic DNA Translation: AAB96504.1 AY603355 Genomic DNA Translation: AAT10485.1 |
RefSeqi | YP_232977.1, NC_006998.1 |
3D structure databases
SMRi | Q76ZT1 |
ModBasei | Search... |
Genome annotation databases
GeneIDi | 3707551 |
KEGGi | vg:3707551 |
Family and domain databases
CDDi | cd20756, capping_2-OMTase_Poxviridae, 1 hit |
InterProi | View protein in InterPro IPR000176, mRNA_MeTrfase-like IPR025804, Pox/kineto_cap_MeTfrase IPR030375, Poxvir_cap_MeTfrase IPR029063, SAM-dependent_MTases |
Pfami | View protein in Pfam PF01358, PARP_regulatory, 1 hit |
PIRSFi | PIRSF003726, PolA_polym_reg_poxV, 1 hit |
SUPFAMi | SSF53335, SSF53335, 1 hit |
PROSITEi | View protein in PROSITE PS51612, SAM_MT_2O_PK, 1 hit |
ProtoNeti | Search... |
MobiDBi | Search... |
Entry informationi
Entry namei | MCE_VACCA | |
Accessioni | Q76ZT1Primary (citable) accession number: Q76ZT1 | |
Entry historyi | Integrated into UniProtKB/Swiss-Prot: | December 7, 2004 |
Last sequence update: | July 5, 2004 | |
Last modified: | April 7, 2021 | |
This is version 74 of the entry and version 1 of the sequence. See complete history. | ||
Entry statusi | Reviewed (UniProtKB/Swiss-Prot) | |
Annotation program | Viral Protein Annotation Program |