23EQ | pdb_000023eq

Artificial Copper-binding trimeric protein 1 (Cu(I)TP1)

PDB DOI: https://doi.org/10.2210/pdb23EQ/pdb

Classification: METAL BINDING PROTEIN
Organism(s): Thermus thermophilus
Expression System: Escherichia coli
Mutation(s): Yes

Deposited: 2026-02-04 Released: 2026-07-15
Deposition Author(s): Choi, I., Song, W.J.
Funding Organization(s): National Research Foundation (NRF, Korea)

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 1.81 Å
R-Value Free:
0.259 (Depositor), 0.259 (DCC)
R-Value Work:
0.230 (Depositor), 0.230 (DCC)
R-Value Observed:
0.232 (Depositor)

Starting Model: experimental
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wwPDB Validation 3D Report Full Report

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

Literature

Artificial Copper-binding trimeric protein 1 (Cu(I)TP1)

Choi, I., Song, W.J.

To be published.

Macromolecule Content

Total Structure Weight: 40.58 kDa
Atom Count: 2,335
Modeled Residue Count: 284
Deposited Residue Count: 360
Unique protein chains: 1

Macromolecules

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Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Signaling protein	A, B, C	120	Thermus thermophilus	Mutation(s): 1
UniProt
Find proteins for P83820 (Thermus thermophilus) Explore P83820 Go to UniProtKB: P83820
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Group	P83820
Sequence Annotations Expand
Reference Sequence

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
CU1 Query on CU1 Download:Ideal Coordinates CCD File SDF format, chain D [auth A] MOL2 format, chain D [auth A] mmCIF format, chain D [auth A]	D [auth A]	COPPER (I) ION Cu VMQMZMRVKUZKQL-UHFFFAOYSA-N		Interactions Focus chain D [auth A] Interactions & Density Focus chain D [auth A]

Modified Residues 1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
BP5 Query on BP5	A, B, C	L-PEPTIDE LINKING	C₁₃ H₁₃ N₃ O₂		ALA

Experimental Data & Validation

Experimental Data

Method: X-RAY DIFFRACTION
Resolution: 1.81 Å
R-Value Free: 0.259 (Depositor), 0.259 (DCC)
R-Value Work: 0.230 (Depositor), 0.230 (DCC)
R-Value Observed: 0.232 (Depositor)

Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 45.86	α = 90
b = 78.48	β = 90
c = 85.81	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
XDS	data reduction
XDS	data scaling
MOLREP	phasing

Structure Validation

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Entry History

& Funding Information

Deposition Data

Released Date: 2026-07-15

Deposition Author(s):

Funding Organization	Location	Grant Number
National Research Foundation (NRF, Korea)	Korea, Republic Of	--

Revision History (Full details and data files)

Version 1.0: 2026-07-15
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.