ECODEvolutionary Classification of Protein Domains

Home Browse Search Download Help

About ECOD

ECOD (Evolutionary Classification of Protein Domains) is a hierarchical classification of protein domains based on evolutionary relationships. It combines automated sequence and structure analysis with manual curation.

Quick Links

Browse Classification
Search
Download Data
Documentation
Privacy

Resources

Grishin Lab
UT Southwestern
RCSB PDB
AlphaFold DB
ecod.database@gmail.com

© 2014-2026 Grishin Lab / HHMI / UTSW

e4r3aB3 - ECOD Domain | ECOD

ECOD/Domains/e4r3aB3

e4r3aB3

UID: 001770472

PDB

Range: B:119-190
PDB: 4R3A chain B(all domains)
UniProt: Q2NB77 (all domains)
Gene: ELI_04860

Molecule: Blue-light-activated histidine kinase 2

3D Structure

Loading viewer...

Related Domains

Browse other domains in HisKA_2 →

Classification

AArchitecturealpha duplicates or obligate multimers(a.8)

XX-groupROP-like(605)

HH-groupHomodimeric domain of signal transducing histidine kinase(605.1)

TT-groupHomodimeric domain of signal transducing histidine kinase(605.1.1)

FFamilyHisKA_2(605.1.1.3)

Ligands

in contact, ≤ 4 Å

Phosphoaminophosphonic acid-adenylate esterANP

Shown in the structure viewer. Drug annotations from DrugDomain.

Pfam Families

PF07568HisKA_2

Histidine kinase

ClanCL0025His_Kinase_A

External Links

ECOD PDB View: 4R3A RCSB PDB: 4R3A PDBe: 4R3A UniProt: Q2NB77

Downloads

Download Domain PDB Download Domain FASTA Full PDB Structure