Summary: DBF zinc finger
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DBF zinc finger Provide feedback
This domain is predicted to bind metal ions [1] and is often found associated with PF00533 and PF02178. It was first identified in the Drosophila chiffon gene product [2] and is associated with initiation of DNA replication.
Literature references
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Doerks T, Copley RR, Schultz J, Ponting CP, Bork P; , Genome Res 2002;12:47-56.: Systematic identification of novel protein domain families associated with nuclear functions. PUBMED:11779830 EPMC:11779830
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Landis G, Tower J;, Development. 1999;126:4281-4293.: The Drosophila chiffon gene is required for chorion gene amplification, and is related to the yeast Dbf4 regulator of DNA replication and cell cycle. PUBMED:10477296 EPMC:10477296
Internal database links
SCOOP: | zf-C2H2_jaz zf-met |
Similarity to PfamA using HHSearch: | zf-C2H2_jaz zf-met |
External database links
SMART: | ZnF_DBF |
This tab holds annotation information from the InterPro database.
InterPro entry IPR006572
Zinc finger (Znf) domains are relatively small protein motifs which contain multiple finger-like protrusions that make tandem contacts with their target molecule. Some of these domains bind zinc, but many do not; instead binding other metals such as iron, or no metal at all. For example, some family members form salt bridges to stabilise the finger-like folds. They were first identified as a DNA-binding motif in transcription factor TFIIIA from Xenopus laevis (African clawed frog), however they are now recognised to bind DNA, RNA, protein and/or lipid substrates [PUBMED:10529348, PUBMED:15963892, PUBMED:15718139, PUBMED:17210253, PUBMED:12665246]. Their binding properties depend on the amino acid sequence of the finger domains and of the linker between fingers, as well as on the higher-order structures and the number of fingers. Znf domains are often found in clusters, where fingers can have different binding specificities. There are many superfamilies of Znf motifs, varying in both sequence and structure. They display considerable versatility in binding modes, even between members of the same class (e.g. some bind DNA, others protein), suggesting that Znf motifs are stable scaffolds that have evolved specialised functions. For example, Znf-containing proteins function in gene transcription, translation, mRNA trafficking, cytoskeleton organisation, epithelial development, cell adhesion, protein folding, chromatin remodelling and zinc sensing, to name but a few [PUBMED:11179890]. Zinc-binding motifs are stable structures, and they rarely undergo conformational changes upon binding their target.
In eukaryotes, initiation of DNA replication requires the assembly of pre-replication complexes (pre-RCs) on chromatin during the G1 phase. In the S phase, pre-RCs are activated by two protein kinases, Cdk2 and Cdc7, which results in the loading of replication factors and the unwinding of replication origins by the MCM helicase complex [PUBMED:8984634]. Cdc7 is a serine/threonine kinase that is conserved from yeast to human. It is regulated by its association with a regulatory subunit, the Dbf4 protein. This complex is often referred to as DDK (Dbf4-dependent kinase) [PUBMED:14643426].
DBF4 contains an N-terminal BRCT domain and a C-terminal conserved region that could potentially coordinate one zinc atom, the DBF4-type zinc finger. This entry represents the zinc finger, which is important for the interaction with Cdc7 [PUBMED:8943332, PUBMED:8066465].
Gene Ontology
The mapping between Pfam and Gene Ontology is provided by InterPro. If you use this data please cite InterPro.
Molecular function | zinc ion binding (GO:0008270) |
nucleic acid binding (GO:0003676) |
Domain organisation
Below is a listing of the unique domain organisations or architectures in which this domain is found. More...
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Pfam Clan
This family is a member of clan C2H2-zf (CL0361), which has the following description:
Superfamily of classical and closely related C2H2 or beta-beta-alpha zinc finger DNA-binding domains.
The clan contains the following 52 members:
ARS2 DUF3449 GAGA Hat1_N Integrase_H2C2 KN17_SH3 Nairovirus_M ROS_MUCR Sgf11 UBZ_FAAP20 Zap1_zf2 zf-AD zf-BED zf-C2H2 zf-C2H2_10 zf-C2H2_11 zf-C2H2_2 zf-C2H2_3 zf-C2H2_3rep zf-C2H2_4 zf-C2H2_6 zf-C2H2_7 zf-C2H2_8 zf-C2H2_9 zf-C2H2_aberr zf-C2H2_jaz zf-C2HC_2 zf-C2HE zf-CRD zf-DBF zf-Di19 zf-H2C2 zf-H2C2_2 zf-H2C2_5 zf-H3C2 zf-LYAR zf-met zf-met2 zf-MYST zf-RAG1 zf-U1 zf-U11-48K zf-WRNIP1_ubi zf_C2H2_10 zf_C2H2_13 zf_C2H2_6 zf_C2H2_ZHX zf_C2HC_14 zf_Hakai zf_UBZ zf_ZIC Zn-C2H2_12Alignments
We store a range of different sequence alignments for families. As well as the seed alignment from which the family is built, we provide the full alignment, generated by searching the sequence database (reference proteomes) using the family HMM. We also generate alignments using four representative proteomes (RP) sets, the UniProtKB sequence database, the NCBI sequence database, and our metagenomics sequence database. More...
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We make a range of alignments for each Pfam-A family. You can see a description of each above. You can view these alignments in various ways but please note that some types of alignment are never generated while others may not be available for all families, most commonly because the alignments are too large to handle.
Seed (104) |
Full (1221) |
Representative proteomes | UniProt (1880) |
NCBI (3104) |
Meta (0) |
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RP15 (194) |
RP35 (470) |
RP55 (809) |
RP75 (1222) |
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PP/heatmap | 1 |
1Cannot generate PP/Heatmap alignments for seeds; no PP data available
Key:
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Seed (104) |
Full (1221) |
Representative proteomes | UniProt (1880) |
NCBI (3104) |
Meta (0) |
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RP15 (194) |
RP35 (470) |
RP55 (809) |
RP75 (1222) |
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Raw Stockholm | |||||||||
Gzipped |
You can also download a FASTA format file containing the full-length sequences for all sequences in the full alignment.
HMM logo
HMM logos is one way of visualising profile HMMs. Logos provide a quick overview of the properties of an HMM in a graphical form. You can see a more detailed description of HMM logos and find out how you can interpret them here. More...
Trees
This page displays the phylogenetic tree for this family's seed alignment. We use FastTree to calculate neighbour join trees with a local bootstrap based on 100 resamples (shown next to the tree nodes). FastTree calculates approximately-maximum-likelihood phylogenetic trees from our seed alignment.
Note: You can also download the data file for the tree.
Curation and family details
This section shows the detailed information about the Pfam family. You can see the definitions of many of the terms in this section in the glossary and a fuller explanation of the scoring system that we use in the scores section of the help pages.
Curation
Seed source: | [1] |
Previous IDs: | none |
Type: | Domain |
Sequence Ontology: | SO:0000417 |
Author: |
Studholme DJ |
Number in seed: | 104 |
Number in full: | 1221 |
Average length of the domain: | 43.90 aa |
Average identity of full alignment: | 41 % |
Average coverage of the sequence by the domain: | 5.58 % |
HMM information
HMM build commands: |
build method: hmmbuild -o /dev/null HMM SEED
search method: hmmsearch -Z 47079205 -E 1000 --cpu 4 HMM pfamseq
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Model details: |
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Model length: | 45 | ||||||||||||
Family (HMM) version: | 13 | ||||||||||||
Download: | download the raw HMM for this family |
Species distribution
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Interactions
There is 1 interaction for this family. More...
PkinaseStructures
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 zf-DBF domain has been found. There are 6 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 sequence.
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