A4GBY4 (PA_I77AA) Reviewed, UniProtKB/Swiss-Prot

Names and origin

Protein names

Recommended name:
Polymerase acidic protein

Alternative name(s):
RNA-directed RNA polymerase subunit P2

Gene names

Name:

PA

Organism

Influenza A virus (strain A/Brazil/11/1978 H1N1) [Complete proteome]

Taxonomic identifier

393560 [NCBI]

Taxonomic lineage

Viruses › ssRNA viruses › ssRNA negative-strand viruses › Orthomyxoviridae › Influenzavirus A › Influenza A virus › H1N1 subtype

Virus host

Aves [TaxID: 8782]
Homo sapiens (Human) [TaxID: 9606]
Sus scrofa (Pig) [TaxID: 9823]

Protein attributes

Sequence length	716 AA.
Sequence status	Complete.
Protein existence	Inferred from homology

General annotation (Comments)

Function	Implicated in endonuclease cleavage of capped RNA primers. Displays an elongation factor activity in viral RNA synthesis. Dispensable for viral transcription, but not replication By similarity.
Subunit structure	Influenza RNA polymerase is composed of three subunits: PB1, PB2 and PA By similarity.
Post-translational modification	Phosphorylated on serines and threonines by host kinases, including human casein kinase II By similarity.
Sequence similarities	Belongs to the influenza viruses PA family.

Ontologies

Keywords
Biological process	Host gene expression shutoff by virus Host transcription shutoff by virus Host-virus interaction Inhibition of host RNA polymerase II by virus
Coding sequence diversity	Ribosomal frameshifting
PTM	Phosphoprotein
Technical term	Complete proteome
Gene Ontology (GO)
Biological_process	suppression by virus of host RNA polymerase II activity Inferred from electronic annotation. Source: UniProtKB-KW transcription, DNA-dependent Inferred from electronic annotation. Source: InterPro
Molecular_function	RNA binding Inferred from electronic annotation. Source: InterPro RNA-directed RNA polymerase activity Inferred from electronic annotation. Source: InterPro
Complete GO annotation...

Alternative products

This entry describes 2 isoforms produced by ribosomal frameshifting. [Align] [Select]

Isoform PA (identifier: A4GBY4-1)

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.

Isoform PA-X (identifier: P0CK67-1)

The sequence of this isoform can be found in the external entry P0CK67.
Isoforms of the same protein are often annotated in two different entries if their sequences differ significantly.

Sequence annotation (Features)

	Feature key	Position(s)	Length	Description	Graphical view	Feature identifier
Molecule processing
	Chain	1 – 716	716	Polymerase acidic protein		PRO_0000373005

Sequences

	Sequence		Length	Mass (Da)
	Isoform PA [UniParc]. Last modified April 17, 2007. Version 1. Checksum: F7EC6B241DB645E7	FASTA	716	82,761
	10 20 30 40 50 60 MEDFVRQCFN PMIVELAEKA MKEYGEDLKI ETNKFAAICT HLEVCFMYSD FHFINEQGES 70 80 90 100 110 120 IIVELDDPNA LLKHRFEIIE GRDRTMAWTV VNSICNTTGA EKPKFLPDLY DYKENRFIEI 130 140 150 160 170 180 GVTRREVHIY YLEKANKIKS EKTHIHIFSF TGEEMATKAD YTLDEESRAR IKTRLFTIRQ 190 200 210 220 230 240 EMASRGLWDS FRQSERGEET IEERFEITGT MRRLADQSLP PNFSCLENFR AYVDGFEPNG 250 260 270 280 290 300 YIEGKLSQMS KEVNARIEPF LKTTPRPIRL PDGPPCSQRS KFLLMDALKL SIEDPSHEGE 310 320 330 340 350 360 GIPLYDAIKC MRTFFGWKEP YVVKPHEKGI NPNYLLSWKQ VLAELQDIEN EGKIPRTKNM 370 380 390 400 410 420 KKTSQLKWAL GENMAPEKVD FDDCKDISDL KQYDSDEPKL RSLSSWIQNE FNKACELTDS 430 440 450 460 470 480 IWIELDEIGE DVAPIEHIAS MRRNYFTAEV SHCRATEYIM KGVYINTALL NASCAAMDDF 490 500 510 520 530 540 QLIPMISKCR TKEGRRKTNL YGFIIKGRSH LRNDTDVVNF VSMEFSLTDP RLEPHKWEKY 550 560 570 580 590 600 CVLEIGDMLL RSAIGQVSRP MFLYVRTNGT SKIKMKWGME MRRCLLQSLQ QIESMIEAES 610 620 630 640 650 660 SVKEKDMTKE FFENKSETWP IGESPKGVEE GSIGKVCRTL LAKSVFNSLY ASPQLEGFSA 670 680 690 700 710 ESRKLLLVVQ ALRDNLEPGT FDLGGLYEAI EECLINDPWV LLNASWFNSF LTHALR
	Isoform PA-X [UniParc]. See P0CK67.		–	–

References

[1]

"The NIAID influenza genome sequencing project." Ghedin E., Spiro D., Miller N., Zaborsky J., Feldblyum T., Subbu V., Shumway M., Sparenborg J., Groveman L., Halpin R., Sitz J., Koo H., Salzberg S.L., Webster R.G., Hoffmann E., Krauss S., Naeve C., Bao Y. , Bolotov P., Dernovoy D., Kiryutin B., Lipman D.J., Tatusova T. Submitted (MAR-2007) to the EMBL/GenBank/DDBJ databases Cited for: NUCLEOTIDE SEQUENCE [GENOMIC RNA].

[2]

The NIAID Influenza Genome Sequencing Consortium Submitted (MAR-2007) to the EMBL/GenBank/DDBJ databases Cited for: NUCLEOTIDE SEQUENCE [GENOMIC RNA].

Cross-references

Sequence databases
EMBL GenBank DDBJ	CY020298 Viral cRNA. Translation: ABO38072.1.
3D structure databases
ModBase	Search...
Protocols and materials databases
StructuralBiologyKnowledgebase	Search...
Family and domain databases
InterPro	IPR001009. RNA-dir_pol_influenzavirus. [Graphical view]
Pfam	PF00603. Flu_PA. 1 hit. [Graphical view]
ProtoNet	Search...

Entry information

Entry name

PA_I77AA

Accession

Primary (citable) accession number: A4GBY4

Entry history

Integrated into UniProtKB/Swiss-Prot:	May 5, 2009
Last sequence update:	April 17, 2007
Last modified:	January 9, 2013
This is version 21 of the entry and version 1 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation program

Viral Protein Annotation Program