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

e3nk9A1 - ECOD Domain | ECOD

ECOD/Domains/e3nk9A1

e3nk9A1

UID: 000422999

PDB

Range: A:7-141
PDB: 3NK9 chain A(all domains)
UniProt: P00644 (all domains)
Gene: nuc

Molecule: Nuclease A

3D Structure

Loading viewer...

Related Domains

Browse other domains in SNase →

Classification

AArchitecturebeta barrels(a.1)

XX-groupOB-fold(2)

HH-groupStaphylococcal nuclease(2.6)

TT-groupStaphylococcal nuclease(2.6.1)

FFamilySNase(2.6.1.1)

Ligands

in contact, ≤ 4 Å

Thymidine-3',5'-DiphosphateTHP
drugDrugBank DB04205
Calcium ionCA
metal

Shown in the structure viewer. Drug annotations from DrugDomain.

Pfam Families

Staphylococcal nuclease homologue

ClanCL0010SH3

External Links

ECOD PDB View: 3NK9 RCSB PDB: 3NK9 PDBe: 3NK9 UniProt: P00644

Downloads

Download Domain PDB Download Domain FASTA Full PDB Structure