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- PDB-7z24: Cryo-EM structure of HIV-1 reverse transcriptase with a DNA aptam... -

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Basic information

Entry
Database: PDB / ID: 7z24
TitleCryo-EM structure of HIV-1 reverse transcriptase with a DNA aptamer in complex with nevirapine
Components
  • (Reverse transcriptase/ribonuclease H) x 2
  • DNA (38-mer)
KeywordsTRANSFERASE / Reverse transcriptase / RT-aptamer complex / NON-NUCLEOSIDE INHIBITOR / P51 / P66
Function / homology
Function and homology information


HIV-1 retropepsin / : / retroviral ribonuclease H / exoribonuclease H / : / exoribonuclease H activity / host multivesicular body / DNA integration / RNA-directed DNA polymerase / viral genome integration into host DNA ...HIV-1 retropepsin / : / retroviral ribonuclease H / exoribonuclease H / : / exoribonuclease H activity / host multivesicular body / DNA integration / RNA-directed DNA polymerase / viral genome integration into host DNA / viral penetration into host nucleus / establishment of integrated proviral latency / RNA-directed DNA polymerase activity / Transferases; Transferring phosphorus-containing groups; Nucleotidyltransferases / RNA-DNA hybrid ribonuclease activity / viral nucleocapsid / DNA recombination / Hydrolases; Acting on ester bonds / DNA-directed DNA polymerase / aspartic-type endopeptidase activity / DNA-directed DNA polymerase activity / symbiont entry into host cell / symbiont-mediated suppression of host gene expression / lipid binding / host cell nucleus / host cell plasma membrane / virion membrane / structural molecule activity / proteolysis / DNA binding / RNA binding / zinc ion binding / membrane
Similarity search - Function
Reverse transcriptase connection / Reverse transcriptase connection domain / Reverse transcriptase thumb / Reverse transcriptase thumb domain / Integrase Zinc binding domain / Zinc finger integrase-type profile. / Integrase-like, N-terminal / Integrase DNA binding domain / Integrase, C-terminal domain superfamily, retroviral / Integrase, N-terminal zinc-binding domain ...Reverse transcriptase connection / Reverse transcriptase connection domain / Reverse transcriptase thumb / Reverse transcriptase thumb domain / Integrase Zinc binding domain / Zinc finger integrase-type profile. / Integrase-like, N-terminal / Integrase DNA binding domain / Integrase, C-terminal domain superfamily, retroviral / Integrase, N-terminal zinc-binding domain / Integrase, C-terminal, retroviral / Integrase DNA binding domain profile. / Immunodeficiency lentiviral matrix, N-terminal / gag gene protein p17 (matrix protein) / RNase H / Integrase core domain / Integrase, catalytic core / Integrase catalytic domain profile. / Retroviral nucleocapsid Gag protein p24, C-terminal domain / Gag protein p24 C-terminal domain / Retropepsin-like catalytic domain / Matrix protein, lentiviral and alpha-retroviral, N-terminal / Ribonuclease H domain / RNase H type-1 domain profile. / Reverse transcriptase (RNA-dependent DNA polymerase) / Reverse transcriptase domain / Reverse transcriptase (RT) catalytic domain profile. / Retropepsins / Retroviral aspartyl protease / Aspartyl protease, retroviral-type family profile. / Peptidase A2A, retrovirus, catalytic / Retrovirus capsid, C-terminal / Retroviral matrix protein / Retrovirus capsid, N-terminal / zinc finger / Zinc knuckle / Zinc finger, CCHC-type superfamily / Zinc finger, CCHC-type / Zinc finger CCHC-type profile. / Ribonuclease H superfamily / Aspartic peptidase, active site / Eukaryotic and viral aspartyl proteases active site. / Aspartic peptidase domain superfamily / Ribonuclease H-like superfamily / Reverse transcriptase/Diguanylate cyclase domain / DNA/RNA polymerase superfamily
Similarity search - Domain/homology
Chem-NVP / DNA / DNA (> 10) / Gag-Pol polyprotein
Similarity search - Component
Biological speciesHuman immunodeficiency virus type 1 BH10
synthetic construct (others)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.32 Å
AuthorsSingh, A.K. / Das, K.
Funding support1items
OrganizationGrant numberCountry
Not funded
CitationJournal: Proc Natl Acad Sci U S A / Year: 2022
Title: Cryo-EM structures of wild-type and E138K/M184I mutant HIV-1 RT/DNA complexed with inhibitors doravirine and rilpivirine.
Authors: Abhimanyu K Singh / Brent De Wijngaert / Marc Bijnens / Kris Uyttersprot / Hoai Nguyen / Sergio E Martinez / Dominique Schols / Piet Herdewijn / Christophe Pannecouque / Eddy Arnold / Kalyan Das /
Abstract: Structures trapping a variety of functional and conformational states of HIV-1 reverse transcriptase (RT) have been determined by X-ray crystallography. These structures have played important roles ...Structures trapping a variety of functional and conformational states of HIV-1 reverse transcriptase (RT) have been determined by X-ray crystallography. These structures have played important roles in explaining the mechanisms of catalysis, inhibition, and drug resistance and in driving drug design. However, structures of several desired complexes of RT could not be obtained even after many crystallization or crystal soaking experiments. The ternary complexes of doravirine and rilpivirine with RT/DNA are such examples. Structural study of HIV-1 RT by single-particle cryo-electron microscopy (cryo-EM) has been challenging due to the enzyme's relatively smaller size and higher flexibility. We optimized a protocol for rapid structure determination of RT complexes by cryo-EM and determined six structures of wild-type and E138K/M184I mutant RT/DNA in complexes with the nonnucleoside inhibitors rilpivirine, doravirine, and nevirapine. RT/DNA/rilpivirine and RT/DNA/doravirine complexes have structural differences between them and differ from the typical conformation of nonnucleoside RT inhibitor (NNRTI)-bound RT/double-stranded DNA (dsDNA), RT/RNA-DNA, and RT/dsRNA complexes; the primer grip in RT/DNA/doravirine and the YMDD motif in RT/DNA/rilpivirine have large shifts. The DNA primer 3'-end in the doravirine-bound structure is positioned at the active site, but the complex is in a nonproductive state. In the mutant RT/DNA/rilpivirine structure, I184 is stacked with the DNA such that their relative positioning can influence rilpivirine in the pocket. Simultaneously, E138K mutation opens the NNRTI-binding pocket entrance, potentially contributing to a faster rate of rilpivirine dissociation by E138K/M184I mutant RT, as reported by an earlier kinetic study. These structural differences have implications for understanding molecular mechanisms of drug resistance and for drug design.
History
DepositionFeb 25, 2022Deposition site: PDBE / Processing site: PDBE
Revision 1.0Jul 20, 2022Provider: repository / Type: Initial release
Revision 1.1Aug 3, 2022Group: Database references / Category: citation / citation_author
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_ASTM / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.journal_volume / _citation.page_first / _citation.page_last / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: Reverse transcriptase/ribonuclease H
B: Reverse transcriptase/ribonuclease H
E: DNA (38-mer)
hetero molecules


Theoretical massNumber of molelcules
Total (without water)126,0834
Polymers125,8163
Non-polymers2661
Water0
1


  • Idetical with deposited unit
  • defined by author
TypeNameSymmetry operationNumber
identity operation1_5551
Buried area9960 Å2
ΔGint-34 kcal/mol
Surface area48890 Å2

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Components

#1: Protein Reverse transcriptase/ribonuclease H / Exoribonuclease H / p66 RT


Mass: 64037.383 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Details: P66 SUBUNIT
Source: (gene. exp.) Human immunodeficiency virus type 1 BH10
Strain: isolate BH10 / Gene: gag-pol / Plasmid: pETDuet-1 / Production host: Escherichia coli BL21(DE3) (bacteria) / Variant (production host): BL21 codon plus RIL
References: UniProt: P03366, RNA-directed DNA polymerase, DNA-directed DNA polymerase, retroviral ribonuclease H, exoribonuclease H
#2: Protein Reverse transcriptase/ribonuclease H / Exoribonuclease H / p51 RT


Mass: 50039.488 Da / Num. of mol.: 1 / Fragment: P51 subunit
Source method: isolated from a genetically manipulated source
Details: P51 subunit
Source: (gene. exp.) Human immunodeficiency virus type 1 BH10
Gene: gag-pol / Plasmid: pETDuet-1 / Production host: Escherichia coli BL21(DE3) (bacteria) / Variant (production host): BL21 codon plus RIL
References: UniProt: P03366, RNA-directed DNA polymerase, DNA-directed DNA polymerase, retroviral ribonuclease H, exoribonuclease H
#3: DNA chain DNA (38-mer)


Mass: 11739.513 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) synthetic construct (others)
#4: Chemical ChemComp-NVP / 11-CYCLOPROPYL-5,11-DIHYDRO-4-METHYL-6H-DIPYRIDO[3,2-B:2',3'-E][1,4]DIAZEPIN-6-ONE / NON-NUCLEOSIDE RT INHIBITOR NEVIRAPINE / Nevirapine


Mass: 266.298 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C15H14N4O / Feature type: SUBJECT OF INVESTIGATION / Comment: medication, antiretroviral*YM
Has ligand of interestY

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

Component
IDNameTypeEntity IDParent-IDSource
1HIV-1 reverse transcriptase with a DNA aptamer in complex with nevirapineCOMPLEX#1-#30RECOMBINANT
2HIV-1 REVERSE TRANSCRIPTASE P66 SUBUNITCOMPLEX#11RECOMBINANT
3HIV-1 REVERSE TRANSCRIPTASE P51 SUBUNITCOMPLEX#21RECOMBINANT
Molecular weight
IDEntity assembly-IDValue (°)Experimental value
110.1284 MDaNO
21NO
31NO
Source (natural)
IDEntity assembly-IDOrganismNcbi tax-ID
21Human immunodeficiency virus type 1 BH1011678
32Human immunodeficiency virus type 1 BH1011678
43Human immunodeficiency virus type 1 BH1011678
Source (recombinant)
IDEntity assembly-IDOrganismNcbi tax-ID
21Escherichia coli BL21(DE3) (bacteria)469008
32Escherichia coli BL21(DE3) (bacteria)469008
43Escherichia coli BL21(DE3) (bacteria)469008
Buffer solutionpH: 8
Buffer component
IDConc.NameFormulaBuffer-ID
110 mMTris-HClTrisNH2C(CH2OH)3HCl1
275 mMNaClSodium chlorideNaClSodium chloride1
SpecimenConc.: 0.3 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid material: GOLD / Grid mesh size: 200 divisions/in. / Grid type: Quantifoil R1.2/1.3
VitrificationInstrument: LEICA EM GP / Cryogen name: ETHANE / Humidity: 95 % / Chamber temperature: 281 K

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Electron microscopy imaging

MicroscopyModel: TFS GLACIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 200 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELDBright-field microscopy / Nominal magnification: 150000 X / Nominal defocus max: 2200 nm / Nominal defocus min: 800 nm / Calibrated defocus min: 500 nm / Calibrated defocus max: 2500 nm / Cs: 2.7 mm / C2 aperture diameter: 50 µm / Alignment procedure: COMA FREE
Specimen holderCryogen: NITROGEN
Image recordingAverage exposure time: 55 sec. / Electron dose: 40 e/Å2 / Detector mode: COUNTING / Film or detector model: FEI FALCON III (4k x 4k) / Num. of grids imaged: 1 / Num. of real images: 1910

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Processing

EM software
IDNameVersionCategory
1RELION3.1particle selection
2EPU2.9.0image acquisition
4CTFFIND4CTF correction
7Cootmodel fitting
9RELION3.1initial Euler assignment
10RELION3.1final Euler assignment
11RELION3.1classification
12RELION3.13D reconstruction
13PHENIX1.19model refinement
CTF correctionType: NONE
Particle selectionNum. of particles selected: 1792933
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 3.32 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 298193 / Symmetry type: POINT
Atomic model buildingB value: 150.4 / Protocol: FLEXIBLE FIT / Space: REAL / Target criteria: Correlation coefficient
Atomic model buildingPDB-ID: 5HP1

5hp1

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