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

e3u55A2 - ECOD Domain | ECOD

ECOD/Domains/e3u55A2

e3u55A2

UID: 001237933

PDB

Range: A:12-238
PDB: 3U55 chain A(all domains)
UniProt: O57978 (all domains)
Gene: purC

Molecule: Phosphoribosylaminoimidazole-succinocarboxamide synthase

3D Structure

Loading viewer...

Related Domains

Browse other domains in SAICAR_synt →

Classification

AArchitecturea+b complex topology(a.14)

XX-groupProtein kinase/SAICAR synthase/ATP-grasp(206)

HH-groupProtein kinase/SAICAR synthase/ATP-grasp(206.1)

TT-groupSAICAR synthase(206.1.2)

FFamilySAICAR_synt(206.1.2.1)

Ligands

in contact, ≤ 4 Å

Only buffers and crystallization additives.

+ 2 additives (Acetate, Sulfate ion)

AcetateACT
DrugBank DB14511
Sulfate ionSO4
DrugBank DB14546

Shown in the structure viewer. Drug annotations from DrugDomain.

Pfam Families

PF01259SAICAR_synt

SAICAR synthetase

External Links

ECOD PDB View: 3U55 RCSB PDB: 3U55 PDBe: 3U55 UniProt: O57978

Downloads

Download Domain PDB Download Domain FASTA Full PDB Structure