7KJW

Structure of HIV-1 reverse transcriptase initiation complex core with efavirenz

Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.90 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history. 


Literature

High-resolution view of HIV-1 reverse transcriptase initiation complexes and inhibition by NNRTI drugs.

Ha, B., Larsen, K.P., Zhang, J., Fu, Z., Montabana, E., Jackson, L.N., Chen, D.H., Puglisi, E.V.

(2021) Nat Commun 12: 2500-2500

  • DOI: 10.1038/s41467-021-22628-9
  • Primary Citation of Related Structures:  
    7KJV, 7KJW, 7KJX

  • PubMed Abstract: 

    • Reverse transcription of the HIV-1 viral RNA genome (vRNA) is an integral step in virus replication. Upon viral entry, HIV-1 reverse transcriptase (RT) initiates from a host tRNA Lys 3 primer bound to the vRNA genome and is the target of key antivirals, such as non-nucleoside reverse transcriptase inhibitors (NNRTIs) ...

    Reverse transcription of the HIV-1 viral RNA genome (vRNA) is an integral step in virus replication. Upon viral entry, HIV-1 reverse transcriptase (RT) initiates from a host tRNA Lys 3 primer bound to the vRNA genome and is the target of key antivirals, such as non-nucleoside reverse transcriptase inhibitors (NNRTIs). Initiation proceeds slowly with discrete pausing events along the vRNA template. Despite prior medium-resolution structural characterization of reverse transcriptase initiation complexes (RTICs), higher-resolution structures of the RTIC are needed to understand the molecular mechanisms that underlie initiation. Here we report cryo-EM structures of the core RTIC, RTIC-nevirapine, and RTIC-efavirenz complexes at 2.8, 3.1, and 2.9 Å, respectively. In combination with biochemical studies, these data suggest a basis for rapid dissociation kinetics of RT from the vRNA-tRNA Lys 3 initiation complex and reveal a specific structural mechanism of nucleic acid conformational stabilization during initiation. Finally, our results show that NNRTIs inhibit the RTIC and exacerbate discrete pausing during early reverse transcription.

    Organizational Affiliation: 

    Department of Structural Biology, Stanford University School of Medicine, Stanford, CA, USA. epuglisi@stanford.edu.



Macromolecules

Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Reverse transcriptase/ribonuclease HA562Human immunodeficiency virus type 1 BH10Mutation(s): 2 
Gene Names: gag-pol
EC: 2.7.7.49 (PDB Primary Data), 2.7.7.7 (PDB Primary Data), 3.1.26.13 (PDB Primary Data), 3.4.23.16 (UniProt), 3.1.13.2 (UniProt), 2.7.7 (UniProt), 3.1 (UniProt)
UniProt
Find proteins for P03366 (Human immunodeficiency virus type 1 group M subtype B (isolate BH10))
Explore P03366 
Go to UniProtKB:  P03366
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP03366
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
reverse transcriptase p51 subunitB442Human immunodeficiency virus 1Mutation(s): 1 
Gene Names: gag-pol
EC: 3.4.23.16 (UniProt), 2.7.7.49 (UniProt), 2.7.7.7 (UniProt), 3.1.26.13 (UniProt), 3.1.13.2 (UniProt), 2.7.7 (UniProt), 3.1 (UniProt)
UniProt
Find proteins for P03366 (Human immunodeficiency virus type 1 group M subtype B (isolate BH10))
Explore P03366 
Go to UniProtKB:  P03366
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP03366
Protein Feature View
Expand
  • Reference Sequence
Find similar nucleic acids by: 3D Structure
Entity ID: 3
MoleculeChainsLengthOrganismImage
HIV-1 viral RNA fragmentC26Human immunodeficiency virus 1
Protein Feature View
Expand
  • Reference Sequence
Find similar nucleic acids by: 3D Structure
Entity ID: 4
MoleculeChainsLengthOrganismImage
tRNA lysine 3 fragment with GNRA tetraloopD39Homo sapiens
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
EFZ (Subject of Investigation/LOI)
Query on EFZ
Download Ideal Coordinates CCD File 
F [auth A](-)-6-CHLORO-4-CYCLOPROPYLETHYNYL-4-TRIFLUOROMETHYL-1,4-DIHYDRO-2H-3,1-BENZOXAZIN-2-ONE
C14 H9 Cl F3 N O2
XPOQHMRABVBWPR-ZDUSSCGKSA-N		 Ligand Interaction
MG
Query on MG
Download Ideal Coordinates CCD File 
E [auth A]MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.90 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
MODEL REFINEMENTPHENIX
RECONSTRUCTIONRELION

Structure Validation

View Full Validation Report



View more in-depth experimental data
Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)United StatesAI150464

Revision History  (Full details and data files)

  • Version 1.0: 2021-03-17
    Type: Initial release
  • Version 1.1: 2021-05-12
    Changes: Database references