High resolution cryo-EM maps of Human Papillomavirus 16 reveal L2 location and heparin-induced conformational changes

Experimental Data Snapshot

  • Resolution: 4.30 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report

This is version 1.4 of the entry. See complete history


Cryoelectron Microscopy Maps of Human Papillomavirus 16 Reveal L2 Densities and Heparin Binding Site.

Guan, J.Bywaters, S.M.Brendle, S.A.Ashley, R.E.Makhov, A.M.Conway, J.F.Christensen, N.D.Hafenstein, S.

(2017) Structure 25: 253-263

  • DOI: https://doi.org/10.1016/j.str.2016.12.001
  • Primary Citation of Related Structures:  
    5KEP, 5KEQ

  • PubMed Abstract: 

    Human papillomavirus (HPV) is a significant health burden and leading cause of virus-induced cancers. The current commercial vaccines are genotype specific and provide little therapeutic benefit to patients with existing HPV infections. Host entry mechanisms represent an excellent target for alternative therapeutics, but HPV receptor use, the details of cell attachment, and host entry are inadequately understood. Here we present near-atomic resolution structures of the HPV16 capsid and HPV16 in complex with heparin, both determined from cryoelectron micrographs collected with direct electron detection technology. The structures clarify details of capsid architecture for the first time, including variation in L1 major capsid protein conformation and putative location of L2 minor protein. Heparin binds specifically around the capsid icosahedral vertices and may recapitulate the earliest stage of infection, providing a framework for continuing biochemical, genetic, and biophysical studies.

  • Organizational Affiliation

    Department of Structural Biology, University of Pittsburgh School of Medicine, 3501 5th Avenue, Pittsburgh, PA 15260, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Major capsid protein L1
A, B, C, D, E
A, B, C, D, E, F
483Human papillomavirus type 16Mutation(s): 0 
Gene Names: L1
Find proteins for P03101 (Human papillomavirus type 16)
Explore P03101 
Go to UniProtKB:  P03101
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP03101
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 4.30 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Institutes of Health/Office of the DirectorUnited StatesS10OD019995
National Institutes of Health/Office of the DirectorUnited StatesS10OD011986

Revision History  (Full details and data files)

  • Version 1.0: 2017-01-25
    Type: Initial release
  • Version 1.1: 2017-02-22
    Changes: Database references
  • Version 1.2: 2017-09-13
    Changes: Author supporting evidence, Data collection
  • Version 1.3: 2017-12-06
    Changes: Database references
  • Version 1.4: 2023-04-05
    Changes: Database references, Derived calculations