1UMP

Experimental Data Snapshot

wwPDB Validation 3D Report Full Report

Ligand Structure Quality Assessment

This is version 1.3 of the entry. See complete history.

Literature

(2004) Chem Biol 11: 121

PubMed Abstract:
The membrane protein squalene-hopene cyclase was cocrystallized with 2-azasqualene and analyzed by X-ray diffraction to 2.13 A resolution. The conformation of this close analog was clearly established, and it agreed with the common textbook presentation. The bound squalene undergoes only small conformational changes during the formation of rings A through D, thus requiring no intermediate. However, ring E formation is hindered by an entropic barrier, which may explain its absence in the steroids. The structure analysis revealed a mobile region between the active center cavity and the membrane, which may melt, opening a passage for squalene and hopene.

Organizational Affiliation

Institut für Organische Chemie und Biochemie, Albert-Ludwigs-Universität, Albertstr. 21, D-79104 Freiburg, Germany.

Macromolecule Content

Macromolecules

Find similar proteins by:

(by identity cutoff) | 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
SQUALENE--HOPENE CYCLASE	A, B, C	631	Alicyclobacillus acidocaldarius	Mutation(s): 0 EC: 5.4.99.17
UniProt
Find proteins for P33247 (Alicyclobacillus acidocaldarius subsp. acidocaldarius (strain ATCC 27009 / DSM 446 / BCRC 14685 / JCM 5260 / KCTC 1825 / NBRC 15652 / NCIMB 11725 / NRRL B-14509 / 104-IA)) Explore P33247 Go to UniProtKB: P33247
Entity Groups
Sequence Clusters	30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt Group	P33247
Sequence Annotations Expand
Reference Sequence

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
SQA Query on SQA Download Ideal Coordinates CCD File SDF format, chain E [auth A] SDF format, chain H [auth B] SDF format, chain K [auth C] MOL2 format, chain E [auth A] MOL2 format, chain H [auth B] MOL2 format, chain K [auth C]	E [auth A], H [auth B], K [auth C]	2-AZASQUALENE C₂₉ H₅₁ N OBYAAZRQFIVRJS-GUUMBNHASA-N		Interactions Focus chain E [auth A] Focus chain H [auth B] Focus chain K [auth C] Interactions & Density Focus chain E [auth A] Focus chain H [auth B] Focus chain K [auth C]
C8E Query on C8E Download Ideal Coordinates CCD File SDF format, chain D [auth A] SDF format, chain F [auth B] SDF format, chain G [auth B] SDF format, chain I [auth C] SDF format, chain J [auth C] MOL2 format, chain D [auth A] MOL2 format, chain F [auth B] MOL2 format, chain G [auth B] MOL2 format, chain I [auth C] MOL2 format, chain J [auth C]	D [auth A], F [auth B], G [auth B], I [auth C], J [auth C]	(HYDROXYETHYLOXY)TRI(ETHYLOXY)OCTANE C₁₆ H₃₄ O₅ FEOZZFHAVXYAMB-UHFFFAOYSA-N		Interactions Focus chain D [auth A] Focus chain F [auth B] Focus chain G [auth B] Focus chain I [auth C] Focus chain J [auth C] Interactions & Density Focus chain D [auth A] Focus chain F [auth B] Focus chain G [auth B] Focus chain I [auth C] Focus chain J [auth C]

Experimental Data & Validation

Unit Cell:

Software Package:

Entry History

Deposition Author(s):

Reinert, D.J.

Version 1.0: 2004-02-03
Type: Initial release
Version 1.1: 2013-11-20
Changes: Derived calculations, Non-polymer description, Other, Source and taxonomy, Version format compliance
Version 1.2: 2019-05-08
Changes: Data collection, Experimental preparation, Other
Version 1.3: 2023-12-13
Changes: Data collection, Database references, Derived calculations, Other, Refinement description