6ECL

Crystal Structure of a 1,2,4-Triazole Allosteric RNase H Inhibitor in Complex with HIV Reverse Transcriptase

• PDB DOI: https://doi.org/10.2210/pdb6ECL/pdb

• Classification: TRANSFERASE
• Organism(s): Human immunodeficiency virus type 1 BH10
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 2018-08-08 Released: 2019-08-21 
• Deposition Author(s): Kirby, K.A., Sarafianos, S.G.
• Funding Organization(s): National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.38 Å
• R-Value Free: 0.229 
• R-Value Work: 0.185 
• R-Value Observed: 0.187 

Starting Model: experimental

Literature

Crystal Structure of a 1,2,4-Triazole Allosteric RNase H Inhibitor in Complex with HIV Reverse Transcriptase

Kirby, K.A., Sarafianos, S.G.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Biological Assembly Evidence: native gel electrophoresis

Macromolecule Content

• Total Structure Weight: 114.68 kDa 
• Atom Count: 8,075 
• Modelled Residue Count: 957 
• Deposited Residue Count: 986 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Reverse transcriptase/ribonuclease H	A	557	Human immunodeficiency virus type 1 BH10	Mutation(s): 1  EC: 3.1.13.2
UniProt
Find proteins for P03366 (Human immunodeficiency virus type 1 group M subtype B (isolate BH10)) Explore P03366  Go to UniProtKB:  P03366

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Reverse transcriptase/ribonuclease H	B	429	Human immunodeficiency virus type 1 BH10	Mutation(s): 1  EC: 3.1.13.2
UniProt
Find proteins for P03366 (Human immunodeficiency virus type 1 group M subtype B (isolate BH10)) Explore P03366  Go to UniProtKB:  P03366

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
T90	D [auth A]	1-[4-methoxy-3-[[5-methyl-4-(phenylmethyl)-1,2,4-triazol-3-yl]sulfanylmethyl]phenyl]ethanone C20 H21 N3 O2 S GBQPKTFARABQAW-UHFFFAOYSA-N
MN	C [auth A], E [auth A]	MANGANESE (II) ION Mn WAEMQWOKJMHJLA-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.38 Å
• R-Value Free: 0.229 
• R-Value Work: 0.185 
• R-Value Observed: 0.187 
• Space Group: C 1 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 163.109	α = 90
b = 73.409	β = 100.43
c = 108.584	γ = 90

Software Package:

Software Name	Purpose
XDS	data reduction
Aimless	data scaling
PHASER	phasing
PHENIX	refinement
PDB_EXTRACT	data extraction

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2019-08-21 
Deposition Author(s): Kirby, K.A., Sarafianos, S.G.

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Funding Organization	Location	Grant Number
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)	United States	AI100890

Revision History  

• Version 1.0: 2019-08-21
  Type: Initial release
  
• Version 1.1: 2019-12-18
  Changes: Author supporting evidence
• Version 1.2: 2023-10-11
  Changes: Data collection, Database references, Derived calculations, Refinement description