Summary: Domain of unknown function (DUF1868)
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Domain of unknown function (DUF1868) Provide feedback
This group of 2H-phosphodiesterases comprises a single family typified by the protein mlr3352 from M.loti. Members are also present in various alpha-proteobacteria, Synechocystis, Streptococcus and Chilo iridescent virus. The presence of a member of this predominantly bacterial group in a large eukaryotic DNA virus represents a potential case of horizontal transfer from a bacterial source into a virus. Several proteins of bacterial origin have been noticed in the insect viruses (L.M.Iyer, E.V.Koonin and L.Aravind, unpublished observations and these appear to have been acquired from endo-symbiotic or parasitic bacteria that share the same host cells with the viruses. Presence of 2H proteins in the proteomes of large DNA viruses (e.g. T4 57B protein and the Fowl-pox virus FPV025) may point to some role for these proteins in regulating the viral tRNA metabolism. Each member of this family contains an internal duplication, each of which contains an HXTX motif that defines the family.
Mazumder R, Iyer LM, Vasudevan S, Aravind L; , Nucleic Acids Res 2002;30:5229-5243.: Detection of novel members, structure-function analysis and evolutionary classification of the 2H phosphoesterase superfamily. PUBMED:12466548 EPMC:12466548
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- the number of sequences which exhibit this architecture
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This example describes an architecture with one
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This clan includes a number of phosphoesterases that contain an internal duplication.
The clan contains the following 9 members:2_5_RNA_ligase2 2H-phosphodiest AKAP7_NLS CNPase Corona_NS2A CPDase DUF1045 HVSL LigT_PEase
We make a range of alignments for each Pfam-A family:
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1Cannot generate PP/Heatmap alignments for seeds; no PP data available
Key: available, not generated, — not available.
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Curation and family details
|Author:||Mistry J, Sammut SJ|
|Number in seed:||13|
|Number in full:||265|
|Average length of the domain:||117.50 aa|
|Average identity of full alignment:||61 %|
|Average coverage of the sequence by the domain:||51.47 %|
|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:||5|
|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 2H-phosphodiest domain has been found. There are 1 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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