6jup

From Proteopedia

(Difference between revisions)

Revision as of 10:19, 26 February 2020

Mutant PolIV-DNA incoming nucleotide complex

Structural highlights

6jup is a 6 chain structure with sequence from "bacillus_coli"_migula_1895 "bacillus coli" migula 1895. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	,
Gene:	dinB, dbh, dinB_1, dinB_2, A8C65_11955, A9R57_12995, ACU57_05495, AML35_26730, AUQ13_19210, BANRA_02184, BANRA_03427, BET08_31995, BHS87_01175, BJJ90_21040, BMT91_15875, BUE81_28425, C5N07_13800, C9E25_22940, CA593_02435, CRM83_14635, CV83915_01335, CWS33_23695, D0X26_15110, D2185_22400, D3O91_23685, D3Y67_06560, D9D20_20085, D9D69_23735, D9E22_12045, D9F57_19765, D9H66_20200, D9H68_19465, D9I18_13635, D9J11_18290, D9J11_27145, D9J44_21795, DNQ41_05075, DTL43_23485, EAI44_14085, EAI52_15440, EC1094V2_3597, EC3234A_186c00130, EC3426_01008, EC382_20155, EC382_27145, ECTO6_03825, EEP23_17825, EFV02_01800, EFV04_12320, EFV12_23405, EFV17_17010, ERS085365_04420, ERS139211_04423, ERS150873_03537, HW43_04975, NCTC10865_04963, NCTC11022_04998, NCTC11126_03759, NCTC13148_06847, NCTC13462_02133, NCTC8985_02971, NCTC9037_04075, NCTC9045_04586, NCTC9058_02901, NCTC9062_04328, NCTC9073_03243, NCTC9117_04957, NCTC9706_01202, RK56_027425, SAMEA3472043_03017, SAMEA3472047_03125, SAMEA3472070_01946, SAMEA3484427_04943, SAMEA3484429_04916, SAMEA3752557_00095, SAMEA3752559_04620, SAMEA3753300_00345, SK85_00262, WQ89_22460, WR15_21380 ("Bacillus coli" Migula 1895)
Activity:	DNA-directed DNA polymerase, with EC number 2.7.7.7
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[W8STT9_ECOLX] Poorly processive, error-prone DNA polymerase involved in untargeted mutagenesis. Copies undamaged DNA at stalled replication forks, which arise in vivo from mismatched or misaligned primer ends. These misaligned primers can be extended by PolIV. Exhibits no 3'-5' exonuclease (proofreading) activity. May be involved in translesional synthesis.[SAAS:SAAS00538441] Poorly processive, error-prone DNA polymerase involved in untargeted mutagenesis. Copies undamaged DNA at stalled replication forks, which arise in vivo from mismatched or misaligned primer ends. These misaligned primers can be extended by PolIV. Exhibits no 3'-5' exonuclease (proofreading) activity. May be involved in translesional synthesis, in conjunction with the beta clamp from PolIII.[HAMAP-Rule:MF_01113]

Publication Abstract from PubMed

The presence of ribonucleotides in DNA can lead to genomic instability and cellular lethality. To prevent adventitious rNTP incorporation, the majority of the DNA polymerases (dPols) possess a steric filter. The dPol named MsDpo4 (Mycobacterium smegmatis) naturally lacks this steric filter and hence is capable of rNTP addition. The introduction of the steric filter in MsDpo4 did not result in complete abrogation of the ability of this enzyme to incorporate ribonucleotides. In comparison, DNA polymerase IV (PolIV) from Escherichia coli exhibited stringent selection for deoxyribonucleotides. A comparison of MsDpo4 and PolIV led to the discovery of an additional polar filter responsible for sugar selectivity. Thr43 represents the filter in PolIV and this residue forms interactions with the incoming nucleotide to draw it closer to the enzyme surface. As a result, the 2'-OH in rNTPs will clash with the enzyme surface, and therefore ribonucleotides cannot be accommodated in the active site in a conformation compatible with productive catalysis. The substitution of the equivalent residue in MsDpo4-Cys47, with Thr led to a drastic reduction in the ability of the mycobacterial enzyme to incorporate rNTPs. Overall, our studies evince that the polar filter serves to prevent ribonucleotide incorporation by dPols.

A polar filter in DNA polymerases prevents ribonucleotide incorporation.,Johnson MK, Kottur J, Nair DT Nucleic Acids Res. 2019 Nov 18;47(20):10693-10705. doi: 10.1093/nar/gkz792. PMID:31544946^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Johnson MK, Kottur J, Nair DT. A polar filter in DNA polymerases prevents ribonucleotide incorporation. Nucleic Acids Res. 2019 Nov 18;47(20):10693-10705. doi: 10.1093/nar/gkz792. PMID:31544946 doi:http://dx.doi.org/10.1093/nar/gkz792

1 Structural highlights
2 Function
3 Publication Abstract from PubMed
4 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/6jup"

@@ Line 3: / Line 3: @@
 <StructureSection load='6jup' size='340' side='right'caption='[[6jup]], [[Resolution|resolution]] 2.44&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[6jup]] is a 6 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6JUP OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6JUP FirstGlance]. <br>
+<table><tr><td colspan='2'>[[6jup]] is a 6 chain structure with sequence from [http://en.wikipedia.org/wiki/"bacillus_coli"_migula_1895 "bacillus coli" migula 1895]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6JUP OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6JUP FirstGlance]. <br>
 </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=0KX:2-DEOXY-5-O-[(R)-HYDROXY{[(R)-HYDROXY(PHOSPHONOOXY)PHOSPHORYL]AMINO}PHOSPHORYL]CYTIDINE'>0KX</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene></td></tr>
+<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">dinB, dbh, dinB_1, dinB_2, A8C65_11955, A9R57_12995, ACU57_05495, AML35_26730, AUQ13_19210, BANRA_02184, BANRA_03427, BET08_31995, BHS87_01175, BJJ90_21040, BMT91_15875, BUE81_28425, C5N07_13800, C9E25_22940, CA593_02435, CRM83_14635, CV83915_01335, CWS33_23695, D0X26_15110, D2185_22400, D3O91_23685, D3Y67_06560, D9D20_20085, D9D69_23735, D9E22_12045, D9F57_19765, D9H66_20200, D9H68_19465, D9I18_13635, D9J11_18290, D9J11_27145, D9J44_21795, DNQ41_05075, DTL43_23485, EAI44_14085, EAI52_15440, EC1094V2_3597, EC3234A_186c00130, EC3426_01008, EC382_20155, EC382_27145, ECTO6_03825, EEP23_17825, EFV02_01800, EFV04_12320, EFV12_23405, EFV17_17010, ERS085365_04420, ERS139211_04423, ERS150873_03537, HW43_04975, NCTC10865_04963, NCTC11022_04998, NCTC11126_03759, NCTC13148_06847, NCTC13462_02133, NCTC8985_02971, NCTC9037_04075, NCTC9045_04586, NCTC9058_02901, NCTC9062_04328, NCTC9073_03243, NCTC9117_04957, NCTC9706_01202, RK56_027425, SAMEA3472043_03017, SAMEA3472047_03125, SAMEA3472070_01946, SAMEA3484427_04943, SAMEA3484429_04916, SAMEA3752557_00095, SAMEA3752559_04620, SAMEA3753300_00345, SK85_00262, WQ89_22460, WR15_21380 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=562 "Bacillus coli" Migula 1895])</td></tr>
 <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/DNA-directed_DNA_polymerase DNA-directed DNA polymerase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.7.7 2.7.7.7] </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=6jup FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6jup OCA], [http://pdbe.org/6jup PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6jup RCSB], [http://www.ebi.ac.uk/pdbsum/6jup PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6jup ProSAT]</span></td></tr>
@@ Line 23: / Line 24: @@
 __TOC__
 </StructureSection>
+[[Category: Bacillus coli migula 1895]]
 [[Category: DNA-directed DNA polymerase]]
 [[Category: Large Structures]]

6jup

From Proteopedia

Revision as of 10:19, 26 February 2020

Mutant PolIV-DNA incoming nucleotide complex

Structural highlights

Function

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

Personal tools

Navigation

Search

Toolbox