1ul1: Difference between revisions
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== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[1ul1]] is a 6 chain structure with sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. The June 2012 RCSB PDB [http://pdb.rcsb.org/pdb/static.do?p=education_discussion/molecule_of_the_month/index.html Molecule of the Month] feature on ''Sliding Clamps'' by David Goodsell is [http://dx.doi.org/10.2210/rcsb_pdb/mom_2012_6 10.2210/rcsb_pdb/mom_2012_6]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1UL1 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1UL1 FirstGlance]. <br> | <table><tr><td colspan='2'>[[1ul1]] is a 6 chain structure with sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. The June 2012 RCSB PDB [http://pdb.rcsb.org/pdb/static.do?p=education_discussion/molecule_of_the_month/index.html Molecule of the Month] feature on ''Sliding Clamps'' by David Goodsell is [http://dx.doi.org/10.2210/rcsb_pdb/mom_2012_6 10.2210/rcsb_pdb/mom_2012_6]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1UL1 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1UL1 FirstGlance]. <br> | ||
</td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>< | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene></td></tr> | ||
<tr><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1b43|1b43]], [[1a76|1a76]], [[1axc|1axc]]</td></tr> | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1b43|1b43]], [[1a76|1a76]], [[1axc|1axc]]</td></tr> | ||
<tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1ul1 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ul1 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1ul1 RCSB], [http://www.ebi.ac.uk/pdbsum/1ul1 PDBsum]</span></td></tr> | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1ul1 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ul1 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1ul1 RCSB], [http://www.ebi.ac.uk/pdbsum/1ul1 PDBsum]</span></td></tr> | ||
<table> | </table> | ||
== Function == | |||
[[http://www.uniprot.org/uniprot/FEN1_HUMAN FEN1_HUMAN]] Structure-specific nuclease with 5'-flap endonuclease and 5'-3' exonuclease activities involved in DNA replication and repair. During DNA replication, cleaves the 5'-overhanging flap structure that is generated by displacement synthesis when DNA polymerase encounters the 5'-end of a downstream Okazaki fragment. It enters the flap from the 5'-end and then tracks to cleave the flap base, leaving a nick for ligation. Also involved in the long patch base excision repair (LP-BER) pathway, by cleaving within the apurinic/apyrimidinic (AP) site-terminated flap. Acts as a genome stabilization factor that prevents flaps from equilibrating into structurs that lead to duplications and deletions. Also possesses 5'-3' exonuclease activity on nicked or gapped double-stranded DNA, and exhibits RNase H activity. Also involved in replication and repair of rDNA and in repairing mitochondrial DNA.<ref>PMID:7961795</ref> <ref>PMID:8621570</ref> <ref>PMID:10744741</ref> <ref>PMID:11986308</ref> <ref>PMID:18443037</ref> <ref>PMID:20729856</ref> [[http://www.uniprot.org/uniprot/PCNA_HUMAN PCNA_HUMAN]] Auxiliary protein of DNA polymerase delta and is involved in the control of eukaryotic DNA replication by increasing the polymerase's processibility during elongation of the leading strand. Induces a robust stimulatory effect on the 3'-5' exonuclease and 3'-phosphodiesterase, but not apurinic-apyrimidinic (AP) endonuclease, APEX2 activities. Has to be loaded onto DNA in order to be able to stimulate APEX2. Plays a key role in DNA damage response (DDR) by being conveniently positioned at the replication fork to coordinate DNA replication with DNA repair and DNA damage tolerance pathways. Acts as a loading platform to recruit DDR proteins that allow completion of DNA replication after DNA damage and promote postreplication repair: Monoubiquitinated PCNA leads to recruitment of translesion (TLS) polymerases, while 'Lys-63'-linked polyubiquitination of PCNA is involved in error-free pathway and employs recombination mechanisms to synthesize across the lesion.<ref>PMID:19443450</ref> <ref>PMID:18719106</ref> | |||
== Evolutionary Conservation == | == Evolutionary Conservation == | ||
[[Image:Consurf_key_small.gif|200px|right]] | [[Image:Consurf_key_small.gif|200px|right]] | ||
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[[Category: RCSB PDB Molecule of the Month]] | [[Category: RCSB PDB Molecule of the Month]] | ||
[[Category: Sliding Clamps]] | [[Category: Sliding Clamps]] | ||
[[Category: Fukuda, K | [[Category: Fukuda, K]] | ||
[[Category: Hakoshima, T | [[Category: Hakoshima, T]] | ||
[[Category: Hamada, K | [[Category: Hamada, K]] | ||
[[Category: Kitano, K | [[Category: Kitano, K]] | ||
[[Category: Morioka, H | [[Category: Morioka, H]] | ||
[[Category: Ohtsuka, E | [[Category: Ohtsuka, E]] | ||
[[Category: Okada, K | [[Category: Okada, K]] | ||
[[Category: Sakurai, S | [[Category: Sakurai, S]] | ||
[[Category: Uchida, M | [[Category: Uchida, M]] | ||
[[Category: Yamaguchi, H | [[Category: Yamaguchi, H]] | ||
[[Category: Dna clamp]] | [[Category: Dna clamp]] | ||
[[Category: Dna repair]] | [[Category: Dna repair]] | ||