[English] 日本語
Yorodumi Papers
- Database of articles cited by EMDB/PDB/SASBDB data -

+
Search query

Keywords
Structure methods
Author
Journal
IF

-
Structure paper

TitleTool antibody fragments reveal multiple conformations of the rhodopsin-Gi signaling complex.
Journal, issue, pagesBiophys J, Year 2025
Publish dateSep 29, 2025
AuthorsFilip Pamula / Oliver Tejero / Jonas Mühle / Ralf Thoma / Gebhard F X Schertler / Jacopo Marino / Ching-Ju Tsai /
PubMed AbstractAntibody Fab fragments are widely used protein binders that assist in structural studies of G-protein-coupled receptor (GPCR) signaling complexes. Expanding the repertoire of such binders to target ...Antibody Fab fragments are widely used protein binders that assist in structural studies of G-protein-coupled receptor (GPCR) signaling complexes. Expanding the repertoire of such binders to target distinct components of the signaling complex offers opportunities to probe conformational regulation and dynamics. Here, we report the biochemical and cryo-EM characterization of two Fab fragments, Fab79 and Fab13, raised against the rhodopsin-Gαiβγ complex. Fab79 binds to the flexible α-helical domain (AHD) of the Gαi subunit and prevents complex dissociation in the presence of the nonhydrolyzable GTP analog, GTPγS, likely by hindering AHD closure, a step necessary for complex dissociation. In contrast, Fab13 binds rigidly to Gβ without directly contacting Gα or the receptor. These findings show that Fab79 and Fab13 reveal functionally relevant conformational states of G-protein activation and serve as practical tools to stabilize or modulate GPCR signaling complexes.
External linksBiophys J / PubMed:41029899
MethodsEM (single particle)
Resolution3.21 - 5.9 Å
Structure data

17343

8p12

EMDB-17343, PDB-8p12:
Cryo-EM structure of Rhodopsin-Gi bound to antibody fragment Fab13
Method: EM (single particle) / Resolution: 3.21 Å

17344

8p13

EMDB-17344, PDB-8p13:
Cryo-EM structure of Rhodopsin-Gi bound with antibody fragments scFv16 and Fab79, conformation 1
Method: EM (single particle) / Resolution: 5.2 Å

17345

8p15

EMDB-17345, PDB-8p15:
Cryo-EM structure of Rhodopsin-Gi bound with antibody fragments scFv16 and Fab79, conformation 2
Method: EM (single particle) / Resolution: 5.9 Å

Source
  • bos taurus (domestic cattle)
  • homo sapiens (human)
  • mus musculus (house mouse)
KeywordsSIGNALING PROTEIN / GPCR / Rhodopsin / G protein / Fab

+
About Yorodumi Papers

-
News

-
Feb 9, 2022. New format data for meta-information of EMDB entries

New format data for meta-information of EMDB entries

  • Version 3 of the EMDB header file is now the official format.
  • The previous official version 1.9 will be removed from the archive.

Related info.:EMDB header

External links:wwPDB to switch to version 3 of the EMDB data model

-
Aug 12, 2020. Covid-19 info

Covid-19 info

URL: https://pdbj.org/emnavi/covid19.php

New page: Covid-19 featured information page in EM Navigator.

Related info.:Covid-19 info / Mar 5, 2020. Novel coronavirus structure data

+
Mar 5, 2020. Novel coronavirus structure data

Novel coronavirus structure data

Related info.:Yorodumi Speices / Aug 12, 2020. Covid-19 info

External links:COVID-19 featured content - PDBj / Molecule of the Month (242)：Coronavirus Proteases

+
Jan 31, 2019. EMDB accession codes are about to change! (news from PDBe EMDB page)

EMDB accession codes are about to change! (news from PDBe EMDB page)

  • The allocation of 4 digits for EMDB accession codes will soon come to an end. Whilst these codes will remain in use, new EMDB accession codes will include an additional digit and will expand incrementally as the available range of codes is exhausted. The current 4-digit format prefixed with “EMD-” (i.e. EMD-XXXX) will advance to a 5-digit format (i.e. EMD-XXXXX), and so on. It is currently estimated that the 4-digit codes will be depleted around Spring 2019, at which point the 5-digit format will come into force.
  • The EM Navigator/Yorodumi systems omit the EMD- prefix.

Related info.:Q: What is EMD? / ID/Accession-code notation in Yorodumi/EM Navigator

External links:EMDB Accession Codes are Changing Soon! / Contact to PDBj

+
Jul 12, 2017. Major update of PDB

Major update of PDB

  • wwPDB released updated PDB data conforming to the new PDBx/mmCIF dictionary.
  • This is a major update changing the version number from 4 to 5, and with Remediation, in which all the entries are updated.
  • In this update, many items about electron microscopy experimental information are reorganized (e.g. em_software).
  • Now, EM Navigator and Yorodumi are based on the updated data.

External links:wwPDB Remediation / Enriched Model Files Conforming to OneDep Data Standards Now Available in the PDB FTP Archive

-
Yorodumi Papers

Database of articles cited by EMDB/PDB/SASBDB data

  • Database of articles cited by EMDB, PDB, and SASBDB entries
  • Using PubMed data

Related info.:EMDB / PDB / SASBDB / Yorodumi / EMN Papers / Changes in new EM Navigator and Yorodumi

Read more