9Q8K | pdb_00009q8k

Synthetic bicyclic peptide

PDB DOI: https://doi.org/10.2210/pdb9Q8K/pdb

Classification: DE NOVO PROTEIN
Organism(s): synthetic construct
Mutation(s): No

Deposited: 2025-02-25 Released: 2026-03-11
Deposition Author(s): Xue, Y., Ek, M., Sandmark, J.
Funding Organization(s): Other private

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 1.67 Å
R-Value Free:
0.262 (Depositor), 0.249 (DCC)
R-Value Work:
0.235 (Depositor), 0.243 (DCC)
R-Value Observed:
0.236 (Depositor)

Starting Model: experimental
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Ligand Structure Quality Assessment

This is version 1.0 of the entry. See complete history.

Literature

Structure of GFRaL-peptide complex

Sandmark, J., Xue, Y., Ek, M.

To be published.

Macromolecule Content

Total Structure Weight: 4.57 kDa
Atom Count: 309
Modeled Residue Count: 34
Deposited Residue Count: 34
Unique protein chains: 1

Macromolecules

Find similar proteins by: Sequence | 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Synthetic bicyclic peptide (CYS-SER-ASP-ALA-LEU-CYS-LYS-PHE-PHE-ARG-GLU-ASN-THR-LYS-CYS)	A, B	17	synthetic construct	Mutation(s): 0

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
LFI (Subject of Investigation/LOI) Query on LFI Download:Ideal Coordinates CCD File SDF format, chain D [auth B] SDF format, chain C [auth A] MOL2 format, chain D [auth B] MOL2 format, chain C [auth A] mmCIF format, chain D [auth B] mmCIF format, chain C [auth A]	C [auth A], D [auth B]	1-[3,5-bis(3-bromanylpropanoyl)-1,3,5-triazinan-1-yl]-3-bromanyl-propan-1-one C₁₂ H₁₈ Br₃ N₃ O₃ UYNTZRFVDTZUQI-UHFFFAOYSA-N		Interactions Focus chain C [auth A] Focus chain D [auth B] Interactions & Density Focus chain C [auth A] Focus chain D [auth B]

Experimental Data & Validation

Experimental Data

Method: X-RAY DIFFRACTION
Resolution: 1.67 Å
R-Value Free: 0.262 (Depositor), 0.249 (DCC)
R-Value Work: 0.235 (Depositor), 0.243 (DCC)
R-Value Observed: 0.236 (Depositor)

Space Group: I 2₁ 3

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 82.72	α = 90
b = 82.72	β = 90
c = 82.72	γ = 90

Software Package:

Software Name	Purpose
MOSFLM	data reduction
Aimless	data scaling
BUSTER	refinement
XDS	data reduction
PHASER	phasing

Structure Validation

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Ligand Structure Quality Assessment

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Entry History

& Funding Information

Deposition Data

Released Date: 2026-03-11

Deposition Author(s):

Funding Organization	Location	Grant Number
Other private	Sweden	--

Revision History (Full details and data files)

Version 1.0: 2026-03-11
Type: Initial release

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RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.