4F2P

Crystal structure of 5'-methylthioadenosine/S-adenosylhomocysteine nucleosidase from Salmonella enterica with diEtglycol-thio-DADMe-Immucillin-A

PDB DOI: https://doi.org/10.2210/pdb4F2P/pdb

Classification: HYDROLASE/HYDROLASE inhibitor
Organism(s): Salmonella enterica subsp. enterica serovar Choleraesuis str. SCSA50
Expression System: Escherichia coli BL21(DE3)
Mutation(s): No

Deposited: 2012-05-08 Released: 2013-05-01
Deposition Author(s): Haapalainen, A.M., Thomas, K., Bonanno, J.B., Almo, S.C., Schramm, V.L.

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 1.64 Å
R-Value Free: 0.194
R-Value Work: 0.163
R-Value Observed: 0.165

wwPDB Validation 3D Report Full Report

Ligand Structure Quality Assessment

This is version 1.2 of the entry. See complete history.

Literature

Crystal structure of 5'-methylthioadenosine/S-adenosylhomocysteine nucleosidase from Salmonella enterica with diEtglycol-thio-DADMe-Immucillin-A

Haapalainen, A.M., Thomas, K., Tyler, P.C., Evans, G.B., Almo, S.C., Schramm, V.L.

(2013) Structure 21: 963-974

PubMed: 23685211 Search on PubMedSearch on PubMed Central
DOI: https://doi.org/10.1016/j.str.2013.04.009
Primary Citation of Related Structures:
4F1W, 4F2P, 4F2W, 4F3C, 4F3K

PubMed Abstract:
Accumulation of 5'-methylthioadenosine (MTA) and S-adenosylhomocysteine (SAH) in bacteria disrupts the S-adenosylmethionine pool to alter biological methylations, synthesis of polyamines, and production of quorum-sensing molecules. Bacterial metabolism of MTA and SAH depends on MTA/SAH nucleosidase (MTAN), an enzyme not present in humans and a target for quorum sensing because MTAN activity is essential for synthesis of autoinducer-2 molecules. Crystals of Salmonella enterica MTAN with product and transition state analogs of MTA and SAH explain the structural contacts causing pM binding affinity for the inhibitor and reveal a "water-wire" channel for the catalytic nucleophile. The crystal structure shows an extension of the binding pocket filled with polyethylene glycol. We exploited this discovery by the design and synthesis of tailored modifications of the currently existing transition state analogs to fill this site. This site was not anticipated in MTAN structures. Tailored inhibitors with dissociation constants of 5 to 15 pM are characterized.

Organizational Affiliation

Department of Biochemistry, Albert Einstein College of Medicine of Yeshiva University, 1300 Morris Park Avenue, Bronx, NY 10461, USA.

Macromolecule Content

Total Structure Weight: 53.78 kDa
Atom Count: 4,001
Modelled Residue Count: 470
Deposited Residue Count: 496
Unique protein chains: 1

Macromolecules

Find similar proteins by:

(by identity cutoff) | 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
5'-methylthioadenosine/S-adenosylhomocysteine nucleosidase	A, B	248	Salmonella enterica subsp. enterica serovar Choleraesuis str. SCSA50	Mutation(s): 0 Gene Names: EMBL EFZ04802.1, mtnN, pfs, SCA50_0219, SCH_0207 EC: 3.2.2.9
Entity Groups
Sequence Clusters	30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Sequence Annotations Expand
Reference Sequence

Small Molecules

Ligands 4 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
2EL Query on 2EL Download Ideal Coordinates CCD File SDF format, chain C [auth A] SDF format, chain G [auth B] MOL2 format, chain C [auth A] MOL2 format, chain G [auth B]	C [auth A], G [auth B]	(3R,4S)-1-[(4-amino-5H-pyrrolo[3,2-d]pyrimidin-7-yl)methyl]-4-({[2-(2-hydroxyethoxy)ethyl]sulfanyl}methyl)pyrrolidin-3- ol C₁₆ H₂₅ N₅ O₃ S OXNZLFLPEGTARO-OLZOCXBDSA-N		Interactions Focus chain C [auth A] Focus chain G [auth B] Interactions & Density Focus chain C [auth A] Focus chain G [auth B]
GOL Query on GOL Download Ideal Coordinates CCD File SDF format, chain E [auth A] SDF format, chain F [auth A] SDF format, chain I [auth B] MOL2 format, chain E [auth A] MOL2 format, chain F [auth A] MOL2 format, chain I [auth B]	E [auth A], F [auth A], I [auth B]	GLYCEROL C₃ H₈ O₃ PEDCQBHIVMGVHV-UHFFFAOYSA-N		Interactions Focus chain E [auth A] Focus chain F [auth A] Focus chain I [auth B] Interactions & Density Focus chain E [auth A] Focus chain F [auth A] Focus chain I [auth B]
EDO Query on EDO Download Ideal Coordinates CCD File SDF format, chain H [auth B] MOL2 format, chain H [auth B]	H [auth B]	1,2-ETHANEDIOL C₂ H₆ O₂ LYCAIKOWRPUZTN-UHFFFAOYSA-N		Interactions Focus chain H [auth B] Interactions & Density Focus chain H [auth B]
ACT Query on ACT Download Ideal Coordinates CCD File SDF format, chain D [auth A] MOL2 format, chain D [auth A]	D [auth A]	ACETATE ION C₂ H₃ O₂ QTBSBXVTEAMEQO-UHFFFAOYSA-M		Interactions Focus chain D [auth A] Interactions & Density Focus chain D [auth A]

Binding Affinity Annotations
ID	Source	Binding Affinity
2EL	Binding MOAD: 4F2P	Ki: 5.00e-3 (nM) from 1 assay(s)

Experimental Data & Validation

Experimental Data

Method: X-RAY DIFFRACTION
Resolution: 1.64 Å
R-Value Free: 0.194
R-Value Work: 0.163
R-Value Observed: 0.165
Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 52.41	α = 90
b = 70.14	β = 90
c = 122.5	γ = 90

Software Package:

Software Name	Purpose
ADSC	data collection
MOLREP	phasing
REFMAC	refinement
MOSFLM	data reduction
SCALA	data scaling

Structure Validation

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Ligand Structure Quality Assessment

Entry History

Deposition Data

Released Date: 2013-05-01

Deposition Author(s):

Revision History (Full details and data files)

Version 1.0: 2013-05-01
Type: Initial release
Version 1.1: 2013-06-19
Changes: Database references
Version 1.2: 2024-02-28
Changes: Data collection, Database references, Derived calculations, Structure summary