Protein: Protein argonaute (Q8U3D2)
Organism: Pyrococcus furiosus (strain ATCC 43587 / DSM 3638 / JCM 8422 / Vc1)
Function: A DNA-guided ssDNA endonuclease that may play a role in defense against invading mobile genetic elements. Uses short 5'- phospho-ssDNA sequences as guides (gDNA) to bind complementary target strands, resulting in cleavage of the target DNA (tDNA). Endonucleolytically cleaves DNA in short dsDNA (the gDNA indicates where to cleave on the tDNA). Efficient guide-dependent target DNA cleavage requires a minimal gDNA length of 15 nucleotides (nt) and works up to at least 31 nt. Overexpression decreases plasmid transformation efficiency. Has no appreciable activity with gRNA or on target RNA. Also has guide-independent activity on plasmid DNA called 'chopping'. The cleavage site is 10 nucleotides (nt) downstream of the target residue base-paired with the 5'-end of the gDNA, cleavage is insensitive to adenine methylation. DNA cleavage produces 5'-phosphomonoesters (as it can be ligated by T4 DNA ligase)
Sequence: MKAKVVINLVKINKKIIPDKIYVYRLFNDPEEELQKEGYSIYRLAYENVGIVIDPENLIIATTKELEYEGEFIPEGEISFSELRNDYQSKLVLRLLKENGIGEYELSKLLRKFRKPKTFGDYKVIPSVEMSVIKHDEDFYLVIHIIHQIQSMKTLWELVNKDPKELEEFLMTHKENLMLKDIASPLKTVYKPCFEEYTKKPKLDHNQEIVKYWYNYHIERYWNTPEAKLEFYRKFGQVDLKQPAILAKFASKIKKNKNYKIYLLPQLVVPTYNAEQLESDVAKEILEYTKLMPEERKELLENILAEVDSDIIDKSLSEIEVEKIAQELENKIRVRDDKGNSVPISQLNVQKSQLLLWTNYSRKYPVILPYEVPEKFRKIREIPMFIILDSGLLADIQNFATNEFRELVKSMYYSLAKKYNSLAKKARSTNEIGLPFLDFRGKEKVITEDLNSDKGIIEVVEQVSSFMKGKELGLAFIAARNKLSSEKFEEIKRRLFNLNVISQVVNEDTLKNKRDKYDRNRLDLFVRHNLLFQVLSKLGVKYYVLDYRFNYDYIIGIDVAPMKRSEGYIGGSAVMFDSQGYIRKIVPIKIGEQRGESVDMNEFFKEMVDKFKEFNIKLDNKKILLLRDGRITNNEEEGLKYISEMFDIEVVTMDVIKNHPVRAFANMKMYFNLGGAIYLIPHKLKQAKGTPIPIKLAKKRIIKNGKVEKQSITRQDVLDIFILTRLNYGSISADMRLPAPVHYAHKFANAIRNEWKIKEEFLAEGFLYFV
InterPro domains: - IPR003100: PAZ domain (domain) [154-272]
- IPR012337: Ribonuclease H-like superfamily (homologous_superfamily) [325-770]
- IPR057272: Piwi domain, nematodes (domain) [333-753]
- IPR003165: Piwi domain (domain) [473-756]
- IPR021103: Argonaute PAZ domain, archaea (domain) [146-272]
- IPR036085: PAZ domain superfamily (homologous_superfamily) [4-323]
- IPR036397: Ribonuclease H superfamily (homologous_superfamily) [547-770]
- IPR055253: Argonaute, N-terminal domain, thermococcales (domain) [19-78]
Gene Ontology annotations:
Molecular Function (MF): GO:0003674 (molecular function), GO:0005488 (binding), GO:0005515 (protein binding)
Biological Process (BP): GO:0008150 (biological process), GO:0008152 (metabolic process), GO:0009987 (cellular process), GO:0044237 (cellular metabolic process), GO:0071704 (organic substance metabolic process), GO:0044238 (primary metabolic process), GO:0006807 (nitrogen compound metabolic process), GO:0006725 (cellular aromatic compound metabolic process), GO:0034641 (cellular nitrogen compound metabolic process), GO:1901360 (organic cyclic compound metabolic process), GO:0006139 (nucleobase-containing compound metabolic process), GO:0043170 (macromolecule metabolic process), GO:0046483 (heterocycle metabolic process), GO:0090304 (nucleic acid metabolic process), GO:0010467 (gene expression), GO:0016070 (RNA metabolic process), GO:0006396 (RNA processing), GO:0034470 (ncRNA processing), GO:0034660 (ncRNA metabolic process), GO:0006399 (tRNA metabolic process), GO:0008033 (tRNA processing)
Cellular Component (CC): GO:0005575 (cellular component), GO:0032991 (protein-containing complex), GO:1902494 (catalytic complex), GO:0140535 (intracellular protein-containing complex), GO:1905348 (endonuclease complex), GO:1905347 (endodeoxyribonuclease complex)