28YO | pdb_000028yo

Beta-galactosidase from E.Coli

PDB DOI: https://doi.org/10.2210/pdb28YO/pdb
EM Map EMD-56975: EMDB EMDataResource

Classification: HYDROLASE
Organism(s): Escherichia coli
Expression System: Escherichia coli
Mutation(s): Yes

Deposited: 2026-03-02 Released: 2026-06-10
Deposition Author(s): Zimmermann, M., Braun, T.
Funding Organization(s): Swiss National Science Foundation

Experimental Data Snapshot

Method: ELECTRON MICROSCOPY
Resolution: 2.48 Å
Aggregation State: PARTICLE
Reconstruction Method: SINGLE PARTICLE

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

Validation slider image for 28YO

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

Literature

Affinity-tag-based microfluidic protein isolation enables high-resolution Cryo-EM from minimal starting material

Zimmermann, M., Braun, T.

(2026) bioRxiv

DOI: https://doi.org/10.64898/2026.05.20.726462

Macromolecule Content

Total Structure Weight: 475.08 kDa
Atom Count: 32,872
Modeled Residue Count: 4,096
Deposited Residue Count: 4,176
Unique protein chains: 1

Macromolecules

Find similar proteins by:

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Beta-galactosidase	A, B, C, D	1,044	Escherichia coli	Mutation(s): 1 Gene Names: lacZ, b0344, JW0335 EC: 3.2.1.23
UniProt
Find proteins for P00722 (Escherichia coli (strain K12)) Explore P00722 Go to UniProtKB: P00722
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Group	P00722
Sequence Annotations Expand
Reference Sequence

Experimental Data & Validation

Experimental Data

Method: ELECTRON MICROSCOPY
Resolution: 2.48 Å
Aggregation State: PARTICLE
Reconstruction Method: SINGLE PARTICLE

EM Software:

Task	Software Package	Version
RECONSTRUCTION	cryoSPARC	4.7.1
MODEL REFINEMENT	PHENIX	2.0
MODEL REFINEMENT	Coot	1.1.15

Structure Validation

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Entry History

& Funding Information

Deposition Data

Released Date: 2026-06-10

Deposition Author(s):

Funding Organization	Location	Grant Number
Swiss National Science Foundation	Switzerland	--

Revision History (Full details and data files)

Version 1.0: 2026-06-10
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.