9ZK5 | pdb_00009zk5

Crystal structure of a calcium bound C2 domain containing protein from Trichomonas vaginalis (P61 form)

PDB DOI: https://doi.org/10.2210/pdb9ZK5/pdb

Classification: LIPID BINDING PROTEIN
Organism(s): Trichomonas vaginalis G3
Expression System: Escherichia coli BL21(DE3)
Mutation(s): No

Deposited: 2025-12-05 Released: 2025-12-17
Deposition Author(s): Seattle Structural Genomics Center for Infectious Disease (SSGCID)
Funding Organization(s): National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID), National Institutes of Health/Office of the Director

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 1.54 Å
R-Value Free:
0.196 (Depositor), 0.203 (DCC)
R-Value Work:
0.173 (Depositor), 0.178 (DCC)
R-Value Observed:
0.174 (Depositor)

Starting Model: in silico
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wwPDB Validation 3D Report Full Report

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

Literature

Crystal structure of a calcium bound C2 domain containing protein from Trichomonas vaginalis (P61 form)

Liu, L., Lovell, S., Battaile, K.P., Buchko, G.W.

To be published.

Macromolecule Content

Total Structure Weight: 16.96 kDa
Atom Count: 1,330
Modeled Residue Count: 139
Deposited Residue Count: 143
Unique protein chains: 1

Macromolecules

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| 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
C2 domain containing protein	A	143	Trichomonas vaginalis G3	Mutation(s): 0 Gene Names: TVAG_002900
UniProt
Find proteins for A2EZR3 (Trichomonas vaginalis (strain ATCC PRA-98 / G3)) Explore A2EZR3 Go to UniProtKB: A2EZR3
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Group	A2EZR3
Sequence Annotations Expand
Reference Sequence

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
PG4 Query on PG4 Download:Ideal Coordinates CCD File SDF format, chain G [auth A] SDF format, chain H [auth A] MOL2 format, chain G [auth A] MOL2 format, chain H [auth A] mmCIF format, chain G [auth A] mmCIF format, chain H [auth A]	G [auth A], H [auth A]	TETRAETHYLENE GLYCOL C₈ H₁₈ O₅ UWHCKJMYHZGTIT-UHFFFAOYSA-N		Interactions Focus chain G [auth A] Focus chain H [auth A] Interactions & Density Focus chain G [auth A] Focus chain H [auth A]
CA (Subject of Investigation/LOI) Query on CA Download:Ideal Coordinates CCD File SDF format, chain B [auth A] SDF format, chain C [auth A] SDF format, chain D [auth A] MOL2 format, chain B [auth A] MOL2 format, chain C [auth A] MOL2 format, chain D [auth A] mmCIF format, chain B [auth A] mmCIF format, chain C [auth A] mmCIF format, chain D [auth A]	B [auth A], C [auth A], D [auth A]	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N		Interactions Focus chain B [auth A] Focus chain C [auth A] Focus chain D [auth A] Interactions & Density Focus chain B [auth A] Focus chain C [auth A] Focus chain D [auth A]
CL Query on CL Download:Ideal Coordinates CCD File SDF format, chain E [auth A] SDF format, chain F [auth A] MOL2 format, chain E [auth A] MOL2 format, chain F [auth A] mmCIF format, chain E [auth A] mmCIF format, chain F [auth A]	E [auth A], F [auth A]	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M		Interactions Focus chain E [auth A] Focus chain F [auth A] Interactions & Density Focus chain E [auth A] Focus chain F [auth A]

Experimental Data & Validation

Experimental Data

Method: X-RAY DIFFRACTION
Resolution: 1.54 Å
R-Value Free: 0.196 (Depositor), 0.203 (DCC)
R-Value Work: 0.173 (Depositor), 0.178 (DCC)
R-Value Observed: 0.174 (Depositor)

Diffraction Data:

Space Group: P 6₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 72.28	α = 90
b = 72.28	β = 90
c = 76.17	γ = 120

Software Package:

Software Name	Purpose
PHENIX	refinement
Aimless	data scaling
XDS	data reduction
PHASER	phasing
PDB_EXTRACT	data extraction

Structure Validation

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Entry History

& Funding Information

Deposition Data

Released Date: 2025-12-17

Deposition Author(s):

Seattle Structural Genomics Center for Infectious Disease (SSGCID)

Funding Organization	Location	Grant Number
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)	United States	75N93022C00036
National Institutes of Health/Office of the Director	United States	S10OD030394