Summary: Papillomavirus helicase
Papillomavirus helicase Provide feedback
This protein is a DNA helicase that is required for initiation of viral DNA replication. This protein forms a complex with the E2 protein PF00508.
Internal database links
|Similarity to PfamA using HHSearch:||AAA Parvo_NS1 RNA_helicase AAA_5 AAA_17 AAA_18 AAA_22 AAA_23 AAA_33|
External database links
This tab holds annotation information from the InterPro database.
InterPro entry IPR001177
Papillomaviruses are a large family of DNA tumour viruses which give rise to warts in their host species. The helicase E1 protein is an ATP-dependent DNA helicase required for initiation of viral DNA replication [PUBMED:8389467]. It forms a complex with the viral E2 protein, which is a site-specific DNA-binding transcriptional activator. The E1-E2 complex binds to the replication origin which contains binding sites for both proteins [PUBMED:2176744].
The E1 protein is a 70 kDa polypeptide with a central DNA-binding domain and a C-terminal ATPase/helicase domain. It binds specific 18 bp DNA sequences at the origin of replication, melts the DNA duplex and functions as a 3' to 5' helicase [PUBMED:9060646]. In addition to E2 it also interacts with DNA polymerase alpha and replication protein A to effect DNA replication. The DNA-binding domain forms a five-stranded antiparallel beta sheet bordered by four loosely packed alpha helices on one side and two tightly packed helices on the other [PUBMED:10949036]. Two structural modules within this domain, an extended loop and a helix, contain conserved residues and are critical for DNA binding. In solution E1 is a monomer, but binds DNA as a dimer. Recruitment of more E1 subunits to the complex leads to melting of the origin and ultimately to the formation of an E1 hexamer with helicase activity [PUBMED:9658141].
The entry represents the C-terminal region of E1, containing both the DNA-binding and ATPase/helical domains.
The mapping between Pfam and Gene Ontology is provided by InterPro. If you use this data please cite InterPro.
|Molecular function||DNA binding (GO:0003677)|
|ATP binding (GO:0005524)|
|ATP-dependent DNA helicase activity (GO:0004003)|
|Biological process||DNA replication (GO:0006260)|
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This example describes an architecture with one
Gladomain, followed by two consecutive
EGFdomains, and finally a single
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AAA family proteins often perform chaperone-like functions that assist in the assembly, operation, or disassembly of protein complexes .
The clan contains the following 198 members:6PF2K AAA AAA-ATPase_like AAA_10 AAA_11 AAA_12 AAA_13 AAA_14 AAA_15 AAA_16 AAA_17 AAA_18 AAA_19 AAA_2 AAA_21 AAA_22 AAA_23 AAA_24 AAA_25 AAA_26 AAA_27 AAA_28 AAA_29 AAA_3 AAA_30 AAA_31 AAA_32 AAA_33 AAA_34 AAA_35 AAA_4 AAA_5 AAA_6 AAA_7 AAA_8 AAA_9 AAA_PrkA ABC_ATPase ABC_tran ABC_tran_2 Adeno_IVa2 Adenylsucc_synt ADK AFG1_ATPase AIG1 APS_kinase Arch_ATPase Arf ArgK ArsA_ATPase ATP-synt_ab ATP_bind_1 ATP_bind_2 Bac_DnaA CbiA CMS1 CoaE CobA_CobO_BtuR CobU cobW CPT CTP_synth_N Cytidylate_kin Cytidylate_kin2 DAP3 DEAD DEAD_2 DLIC DNA_pack_C DNA_pack_N DNA_pol3_delta DNA_pol3_delta2 DnaB_C dNK DUF1253 DUF1611 DUF2075 DUF2478 DUF258 DUF2791 DUF2813 DUF3584 DUF463 DUF815 DUF853 DUF87 DUF927 Dynamin_N Exonuc_V_gamma FeoB_N Fer4_NifH Flavi_DEAD FTHFS FtsK_SpoIIIE G-alpha Gal-3-0_sulfotr GBP GTP_EFTU GTP_EFTU_D2 GTP_EFTU_D4 Gtr1_RagA Guanylate_kin GvpD HDA2-3 Helicase_C Helicase_C_2 Helicase_C_4 Helicase_RecD Herpes_Helicase Herpes_ori_bp Herpes_TK IIGP IPPT IPT IstB_IS21 KaiC KAP_NTPase Kinesin Kinesin-relat_1 Kinesin-related KTI12 LpxK MCM MEDS Mg_chelatase Mg_chelatase_2 MipZ Miro MMR_HSR1 MobB MukB MutS_V Myosin_head NACHT NB-ARC NOG1 NTPase_1 ParA Parvo_NS1 PAXNEB PduV-EutP PhoH PIF1 Podovirus_Gp16 Polyoma_lg_T_C Pox_A32 PPK2 PPV_E1_C PRK Rad17 Rad51 Ras RecA ResIII RHD3 RHSP RNA12 RNA_helicase RuvB_N SbcCD_C SecA_DEAD Septin Sigma54_activ_2 Sigma54_activat SKI SMC_N SNF2_N Spore_IV_A SRP54 SRPRB Sulfotransfer_1 Sulfotransfer_2 Sulfotransfer_3 Sulphotransf T2SE T4SS-DNA_transf Terminase_1 Terminase_3 Terminase_6 Terminase_GpA Thymidylate_kin TIP49 TK TniB Torsin TraG-D_C tRNA_lig_kinase TrwB_AAD_bind UPF0079 UvrD-helicase UvrD_C UvrD_C_2 Viral_helicase1 VirC1 VirE YhjQ Zeta_toxin Zot
We make a range of alignments for each Pfam-A family:
- the curated alignment from which the HMM for the family is built
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- Representative Proteomes (RPs) at 15%, 35%, 55% and 75% co-membership thresholds
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Curation and family details
|Seed source:||Pfam-B_48 (release 1.0)|
|Number in seed:||66|
|Number in full:||1112|
|Average length of the domain:||256.40 aa|
|Average identity of full alignment:||49 %|
|Average coverage of the sequence by the domain:||68.38 %|
|HMM build commands:||
build method: hmmbuild -o /dev/null HMM SEED
search method: hmmsearch -Z 23193494 -E 1000 --cpu 4 HMM pfamseq
|Family (HMM) version:||12|
|Download:||download the raw HMM for this family|
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For those sequences which have a structure in the Protein DataBank, we use the mapping between UniProt, PDB and Pfam coordinate systems from the PDBe group, to allow us to map Pfam domains onto UniProt sequences and three-dimensional protein structures. The table below shows the structures on which the PPV_E1_C domain has been found. There are 44 instances of this domain found in the PDB. Note that there may be multiple copies of the domain in a single PDB structure, since many structures contain multiple copies of the same protein seqence.
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