Source assertion

PDBe/SIFTS maps PDB 1ZNC to UniProt P22748 with chain-level identity and coverage retained.

Evidence ID: STRUCTURE:PDB:1ZNC:UNIPROT:P22748
Subject dossier: ca4
Source chain: uniprot + pdbe
Upstream record: 1ZNC
Corpus snapshot: 2026-07-14T09:23:31Z
Admission status: Admitted release record

Experimental structure

HUMAN CARBONIC ANHYDRASE IV

PDB ID: 1ZNC
Experimental method: X-ray diffraction
Resolution: %!f(*float64=0xc001ffea30) Å
SIFTS identifier: CAH4_HUMAN
Deposited: 19960917
Released / revised: 19970917 / 20241023

Chain-level mapping

Entity	Chain	Structural asym	Identity	Coverage	UniProt range
1	`A`	`A`	100.0%	90.5%	19–284
1	`B`	`B`	100.0%	90.5%	19–284

Experimental constructs

Entity	Chains / asym IDs	Molecule	Length	Mutation flag	Preparation
1	A, B / A, B	Carbonic anhydrase 4polypeptide(L)	266 residues	not reported in admitted source fields	Genetically manipulated

Interpretation boundary

This record represents an experimentally determined structure, not a predicted model. A co-crystal ligand, if present upstream, does not by itself establish affinity. This record does not infer kinetics, pathway rate, or metabolic flux.

Snapshot provenance

Each retained corpus build input is identified by retrieval time, snapshot path, SHA-256 digest, and exact upstream request. The snapshot files are not embedded in the served binary; the provenance identifiers remain dependencies of this one admitted record, not interchangeable citations.

Retrieved	Snapshot	SHA-256	Upstream request
2026-07-14T09:21:32Z	`raw/uniprot/entries/P22748.json`	`28fa76c5a216b9356479d42199f709dd46e662172f2872078a5491cfe2c618f1`	Open exact source
2026-07-14T09:21:51Z	`raw/pdbe/mappings/1znc.json`	`2ed61740c75d0f5245d905cf37031c2605202be3adb1835828b3456fde882d9e`	Open exact source
2026-07-14T09:22:12Z	`raw/pdbe/summary/chunk-01.json`	`dc1743d788d7927148f1208eac8f948637869ee61880999e81df1b79b57a0758`	Open exact source
2026-07-14T09:22:13Z	`raw/pdbe/experiment/chunk-01.json`	`fb047b9406db82cfc2256bd41ead50e4cd5ebf2ca5567e9be661676830294ed8`	Open exact source
2026-07-14T09:22:13Z	`raw/pdbe/molecules/chunk-01.json`	`4eb4d03de4d05f3f3a47f20fd76567c3ee5d6835db325358bbfe62bf45501b2a`	Open exact source