5M1I | pdb_00005m1i

Structure of GH36 alpha-galactosidase from Thermotoga maritima in a covalent complex with a cyclopropyl carbasugar.

PDB DOI: https://doi.org/10.2210/pdb5M1I/pdb

Classification: HYDROLASE
Organism(s): Thermotoga maritima
Expression System: Escherichia coli
Mutation(s): No

Deposited: 2016-10-07 Released: 2016-11-09
Deposition Author(s): Pengelly, R., Gloster, T.
Funding Organization(s): Wellcome Trust

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 1.55 Å
R-Value Free:
0.183 (Depositor), 0.190 (DCC)
R-Value Work:
0.154 (Depositor), 0.170 (DCC)
R-Value Observed:
0.155 (Depositor)

Starting Model: experimental
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wwPDB Validation 3D Report Full Report

Ligand Structure Quality Assessment

This is version 1.4 of the entry. See complete history.

Literature

Structural Snapshots for Mechanism-Based Inactivation of a Glycoside Hydrolase by Cyclopropyl Carbasugars.

Adamson, C., Pengelly, R.J., Shamsi Kazem Abadi, S., Chakladar, S., Draper, J., Britton, R., Gloster, T.M., Bennet, A.J.

(2016) Angew Chem Int Ed Engl 55: 14978-14982

PubMed: 27783466 Search on PubMedSearch on PubMed Central
DOI: https://doi.org/10.1002/anie.201607431
Primary Citation of Related Structures:
5M0X, 5M12, 5M16, 5M1I

PubMed Abstract:
Glycoside hydrolases (GHs) have attracted considerable attention as targets for therapeutic agents, and thus mechanism-based inhibitors are of great interest. We report the first structural analysis of a carbocyclic mechanism-based GH inactivator, the results of which show that the two Michaelis complexes are in ² H ₃ conformations. We also report the synthesis and reactivity of a fluorinated analogue and the structure of its covalently linked intermediate (flattened ² H ₃ half-chair). We conclude that these inactivator reactions mainly involve motion of the pseudo-anomeric carbon atom, knowledge that should stimulate the design of new transition-state analogues for use as chemical biology tools.

Organizational Affiliation

Department of Chemistry, Simon Fraser University, Burnaby, British Columbia, Canada.

Macromolecule Content

Total Structure Weight: 67.7 kDa
Atom Count: 4,931
Modelled Residue Count: 539
Deposited Residue Count: 575
Unique protein chains: 1

Macromolecules

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(by identity cutoff) | 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Alpha-galactosidase	A	575	Thermotoga maritima	Mutation(s): 0 Gene Names: galA EC: 3.2.1.22
UniProt
Find proteins for G4FEF4 (Thermotoga maritima (strain ATCC 43589 / DSM 3109 / JCM 10099 / NBRC 100826 / MSB8)) Explore G4FEF4 Go to UniProtKB: G4FEF4
Entity Groups
Sequence Clusters	30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt Group	G4FEF4
Sequence Annotations Expand
Reference Sequence LOADING

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
7D8 Query on 7D8 Download Ideal Coordinates CCD File SDF format, chain H [auth A] MOL2 format, chain H [auth A] mmCIF format, chain H [auth A]	H [auth A]	(1~{R},2~{S},3~{S},4~{S},6~{R})-4-fluoranyl-1-(hydroxymethyl)bicyclo[4.1.0]heptane-2,3-diol C₈ H₁₃ F O₃ QSRAFSPBHBMPLO-TXXZRHAASA-N		Interactions Focus chain H [auth A] Interactions & Density Focus chain H [auth A]
SO4 Query on SO4 Download Ideal Coordinates CCD File SDF format, chain B [auth A] SDF format, chain E [auth A] SDF format, chain G [auth A] SDF format, chain C [auth A] SDF format, chain D [auth A] SDF format, chain F [auth A] MOL2 format, chain B [auth A] MOL2 format, chain E [auth A] MOL2 format, chain G [auth A] MOL2 format, chain C [auth A] MOL2 format, chain D [auth A] MOL2 format, chain F [auth A] mmCIF format, chain B [auth A] mmCIF format, chain E [auth A] mmCIF format, chain G [auth A] mmCIF format, chain C [auth A] mmCIF format, chain D [auth A] mmCIF format, chain F [auth A]	B [auth A] C [auth A] D [auth A] E [auth A] F [auth A] B [auth A], C [auth A], D [auth A], E [auth A], F [auth A], G [auth A]	SULFATE ION O₄ S QAOWNCQODCNURD-UHFFFAOYSA-L		Interactions Focus chain B [auth A] Focus chain C [auth A] Focus chain D [auth A] Focus chain E [auth A] Focus chain F [auth A] Focus chain G [auth A] Interactions & Density Focus chain B [auth A] Focus chain C [auth A] Focus chain D [auth A] Focus chain E [auth A] Focus chain F [auth A] Focus chain G [auth A]
EDO Query on EDO Download Ideal Coordinates CCD File SDF format, chain I [auth A] SDF format, chain J [auth A] SDF format, chain K [auth A] SDF format, chain L [auth A] SDF format, chain M [auth A] SDF format, chain N [auth A] SDF format, chain O [auth A] SDF format, chain P [auth A] SDF format, chain Q [auth A] SDF format, chain R [auth A] SDF format, chain S [auth A] SDF format, chain T [auth A] MOL2 format, chain I [auth A] MOL2 format, chain J [auth A] MOL2 format, chain K [auth A] MOL2 format, chain L [auth A] MOL2 format, chain M [auth A] MOL2 format, chain N [auth A] MOL2 format, chain O [auth A] MOL2 format, chain P [auth A] MOL2 format, chain Q [auth A] MOL2 format, chain R [auth A] MOL2 format, chain S [auth A] MOL2 format, chain T [auth A] mmCIF format, chain I [auth A] mmCIF format, chain J [auth A] mmCIF format, chain K [auth A] mmCIF format, chain L [auth A] mmCIF format, chain M [auth A] mmCIF format, chain N [auth A] mmCIF format, chain O [auth A] mmCIF format, chain P [auth A] mmCIF format, chain Q [auth A] mmCIF format, chain R [auth A] mmCIF format, chain S [auth A] mmCIF format, chain T [auth A]	I [auth A] J [auth A] K [auth A] L [auth A] M [auth A] I [auth A], J [auth A], K [auth A], L [auth A], M [auth A], N [auth A], O [auth A], P [auth A], Q [auth A], R [auth A], S [auth A], T [auth A]	1,2-ETHANEDIOL C₂ H₆ O₂ LYCAIKOWRPUZTN-UHFFFAOYSA-N		Interactions Focus chain I [auth A] Focus chain J [auth A] Focus chain K [auth A] Focus chain L [auth A] Focus chain M [auth A] Focus chain N [auth A] Focus chain O [auth A] Focus chain P [auth A] Focus chain Q [auth A] Focus chain R [auth A] Focus chain S [auth A] Focus chain T [auth A] Interactions & Density Focus chain I [auth A] Focus chain J [auth A] Focus chain K [auth A] Focus chain L [auth A] Focus chain M [auth A] Focus chain N [auth A] Focus chain O [auth A] Focus chain P [auth A] Focus chain Q [auth A] Focus chain R [auth A] Focus chain S [auth A] Focus chain T [auth A]

Experimental Data & Validation

Experimental Data

Method: X-RAY DIFFRACTION
Resolution: 1.55 Å
R-Value Free: 0.183 (Depositor), 0.190 (DCC)
R-Value Work: 0.154 (Depositor), 0.170 (DCC)
R-Value Observed: 0.155 (Depositor)

Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 66.903	α = 90
b = 96.239	β = 90
c = 97.589	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
DIALS	data reduction
DIALS	data scaling
MOLREP	phasing

Structure Validation

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Ligand Structure Quality Assessment

Entry History & Funding Information

Deposition Data

Released Date: 2016-11-09

Deposition Author(s):

Pengelly, R.

Gloster, T.

Funding Organization	Location	Grant Number
Wellcome Trust	United Kingdom	--

Revision History (Full details and data files)

Version 1.0: 2016-11-09
Type: Initial release
Version 1.1: 2016-11-16
Changes: Data collection, Structure summary
Version 1.2: 2016-11-30
Changes: Database references
Version 1.3: 2024-01-17
Changes: Data collection, Database references, Refinement description
Version 1.4: 2024-11-13
Changes: Structure summary

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Structure of GH36 alpha-galactosidase from Thermotoga maritima in a covalent complex with a cyclopropyl carbasugar.

Structural Snapshots for Mechanism-Based Inactivation of a Glycoside Hydrolase by Cyclopropyl Carbasugars.

Entity ID: 1

UniProt

Entity Groups

Sequence Annotations

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