4F3C

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

Deposited: 2012-05-09 Released: 2013-05-01
Deposition Author(s): Haapalainen, A.M., Thomas, K., Bonanno, J.B., Almo, S.C., Schramm, V.L.

Experimental Data Snapshot

wwPDB Validation 3D Report Full Report

Ligand Structure Quality Assessment

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

Literature

(2013) Structure 21: 963-974

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

Macromolecules

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(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 EC: 3.2.2.9
Entity Groups
Sequence Clusters	30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Sequence Annotations Expand
Reference Sequence

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
BIG Query on BIG Download Ideal Coordinates CCD File SDF format, chain C [auth A] SDF format, chain E [auth B] MOL2 format, chain C [auth A] MOL2 format, chain E [auth B] mmCIF format, chain C [auth A] mmCIF format, chain E [auth B]	C [auth A], E [auth B]	(3R,4S)-1-[(4-amino-5H-pyrrolo[3,2-d]pyrimidin-7-yl)methyl]-4-[(butylsulfanyl)methyl]pyrrolidin-3-ol C₁₆ H₂₅ N₅ O S LTSUEVPGSXUJHT-OLZOCXBDSA-N		Interactions Focus chain C [auth A] Focus chain E [auth B] Interactions & Density Focus chain C [auth A] Focus chain E [auth B]
EDO Query on EDO Download Ideal Coordinates CCD File SDF format, chain D [auth A] SDF format, chain F [auth B] SDF format, chain G [auth B] MOL2 format, chain D [auth A] MOL2 format, chain F [auth B] MOL2 format, chain G [auth B] mmCIF format, chain D [auth A] mmCIF format, chain F [auth B] mmCIF format, chain G [auth B]	D [auth A], F [auth B], G [auth B]	1,2-ETHANEDIOL C₂ H₆ O₂ LYCAIKOWRPUZTN-UHFFFAOYSA-N		Interactions Focus chain D [auth A] Focus chain F [auth B] Focus chain G [auth B] Interactions & Density Focus chain D [auth A] Focus chain F [auth B] Focus chain G [auth B]

Binding Affinity Annotations
ID	Source	Binding Affinity
BIG	PDBBind: 4F3C	Ki: 1.50e-3 (nM) from 1 assay(s)

Experimental Data & Validation

Unit Cell:

Software Package:

Entry History

Deposition Author(s):

Haapalainen, A.M.

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