8AQ4

In surfo structure of the membrane integral lipoprotein N-acyltransferase Lnt from E. coli in complex with TITC and lyso-PE

PDB DOI: https://doi.org/10.2210/pdb8AQ4/pdb

Classification: TRANSFERASE
Organism(s): Escherichia coli K-12
Expression System: Escherichia coli
Mutation(s): No
Membrane Protein: Yes PDBTMMemProtMDmpstruc

Deposited: 2022-08-11 Released: 2023-07-12
Deposition Author(s): Huang, C.-Y., Weichert, D., Boland, C., Smithers, L., Olieric, V., Wang, M., Caffrey, M.
Funding Organization(s): Science Foundation Ireland, Irish Research Council

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 2.62 Å
R-Value Free: 0.229
R-Value Work: 0.205
R-Value Observed: 0.206

wwPDB Validation 3D Report Full Report

Ligand Structure Quality Assessment

This is version 1.1 of the entry. See complete history.

Literature

Structure snapshots reveal the mechanism of a bacterial membrane lipoprotein N -acyltransferase.

Smithers, L., Degtjarik, O., Weichert, D., Huang, C.Y., Boland, C., Bowen, K., Oluwole, A., Lutomski, C., Robinson, C.V., Scanlan, E.M., Wang, M., Olieric, V., Shalev-Benami, M., Caffrey, M.

(2023) Sci Adv 9: eadf5799-eadf5799

PubMed: 37390210 Search on PubMedSearch on PubMed Central
DOI: https://doi.org/10.1126/sciadv.adf5799
Primary Citation of Related Structures:
8AQ2, 8AQ3, 8AQ4, 8B0K, 8B0L, 8B0M, 8B0N, 8B0O, 8B0P

PubMed Abstract:
Bacterial lipoproteins (BLPs) decorate the surface of membranes in the cell envelope. They function in membrane assembly and stability, as enzymes, and in transport. The final enzyme in the BLP synthesis pathway is the apolipoprotein N -acyltransferase, Lnt, which is proposed to act by a ping-pong mechanism. Here, we use x-ray crystallography and cryo-electron microscopy to chart the structural changes undergone during the progress of the enzyme through the reaction. We identify a single active site that has evolved to bind, individually and sequentially, substrates that satisfy structural and chemical criteria to position reactive parts next to the catalytic triad for reaction. This study validates the ping-pong mechanism, explains the molecular bases for Lnt's substrate promiscuity, and should facilitate the design of antibiotics with minimal off-target effects.

Organizational Affiliation

School of Medicine and School of Biochemistry and Immunology, Trinity College Dublin, Dublin D02 R590, Ireland.

Macromolecule Content

Total Structure Weight: 64.99 kDa
Atom Count: 4,329
Modelled Residue Count: 509
Deposited Residue Count: 532
Unique protein chains: 1

Macromolecules

Find similar proteins by:

(by identity cutoff) | 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Apolipoprotein N-acyltransferase	A	532	Escherichia coli K-12	Mutation(s): 0 Gene Names: lnt, cutE, b0657, JW0654 EC: 2.3.1 Membrane Entity: Yes
UniProt
Find proteins for P23930 (Escherichia coli (strain K12)) Explore P23930 Go to UniProtKB: P23930
Entity Groups
Sequence Clusters	30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt Group	P23930
Sequence Annotations Expand
Reference Sequence

Small Molecules

Ligands 9 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
6OU (Subject of Investigation/LOI) Query on 6OU Download Ideal Coordinates CCD File SDF format, chain G [auth A] SDF format, chain I [auth A] SDF format, chain J [auth A] MOL2 format, chain G [auth A] MOL2 format, chain I [auth A] MOL2 format, chain J [auth A]	G [auth A], I [auth A], J [auth A]	[(2~{R})-1-[2-azanylethoxy(oxidanyl)phosphoryl]oxy-3-hexadecanoyloxy-propan-2-yl] (~{Z})-octadec-9-enoate C₃₉ H₇₆ N O₈ P FHQVHHIBKUMWTI-OTMQOFQLSA-N		Interactions Focus chain G [auth A] Focus chain I [auth A] Focus chain J [auth A] Interactions & Density Focus chain G [auth A] Focus chain I [auth A] Focus chain J [auth A]
LMT Query on LMT Download Ideal Coordinates CCD File SDF format, chain S [auth A] SDF format, chain T [auth A] SDF format, chain U [auth A] MOL2 format, chain S [auth A] MOL2 format, chain T [auth A] MOL2 format, chain U [auth A]	S [auth A], T [auth A], U [auth A]	DODECYL-BETA-D-MALTOSIDE C₂₄ H₄₆ O₁₁ NLEBIOOXCVAHBD-QKMCSOCLSA-N		Interactions Focus chain S [auth A] Focus chain T [auth A] Focus chain U [auth A] Interactions & Density Focus chain S [auth A] Focus chain T [auth A] Focus chain U [auth A]
PG6 Query on PG6 Download Ideal Coordinates CCD File SDF format, chain M [auth A] MOL2 format, chain M [auth A]	M [auth A]	1-(2-METHOXY-ETHOXY)-2-{2-[2-(2-METHOXY-ETHOXY]-ETHOXY}-ETHANE C₁₂ H₂₆ O₆ DMDPGPKXQDIQQG-UHFFFAOYSA-N		Interactions Focus chain M [auth A] Interactions & Density Focus chain M [auth A]
QGT (Subject of Investigation/LOI) Query on QGT Download Ideal Coordinates CCD File SDF format, chain H [auth A] MOL2 format, chain H [auth A]	H [auth A]	~{N}-tridecylmethanethioamide C₁₄ H₂₉ N S QJLABHJQAGUEGP-UHFFFAOYSA-N		Interactions Focus chain H [auth A] Interactions & Density Focus chain H [auth A]
PG5 Query on PG5 Download Ideal Coordinates CCD File SDF format, chain B [auth A] SDF format, chain E [auth A] SDF format, chain K [auth A] SDF format, chain L [auth A] MOL2 format, chain B [auth A] MOL2 format, chain E [auth A] MOL2 format, chain K [auth A] MOL2 format, chain L [auth A]	B [auth A], E [auth A], K [auth A], L [auth A]	1-METHOXY-2-[2-(2-METHOXY-ETHOXY]-ETHANE C₈ H₁₈ O₄ YFNKIDBQEZZDLK-UHFFFAOYSA-N		Interactions Focus chain B [auth A] Focus chain E [auth A] Focus chain K [auth A] Focus chain L [auth A] Interactions & Density Focus chain B [auth A] Focus chain E [auth A] Focus chain K [auth A] Focus chain L [auth A]
TRS Query on TRS Download Ideal Coordinates CCD File SDF format, chain N [auth A] MOL2 format, chain N [auth A]	N [auth A]	2-AMINO-2-HYDROXYMETHYL-PROPANE-1,3-DIOL C₄ H₁₂ N O₃ LENZDBCJOHFCAS-UHFFFAOYSA-O		Interactions Focus chain N [auth A] Interactions & Density Focus chain N [auth A]
GOL Query on GOL Download Ideal Coordinates CCD File SDF format, chain C [auth A] SDF format, chain D [auth A] SDF format, chain F [auth A] SDF format, chain P [auth A] SDF format, chain Q [auth A] SDF format, chain R [auth A] MOL2 format, chain C [auth A] MOL2 format, chain D [auth A] MOL2 format, chain F [auth A] MOL2 format, chain P [auth A] MOL2 format, chain Q [auth A] MOL2 format, chain R [auth A]	C [auth A] D [auth A] F [auth A] P [auth A] Q [auth A] C [auth A], D [auth A], F [auth A], P [auth A], Q [auth A], R [auth A]	GLYCEROL C₃ H₈ O₃ PEDCQBHIVMGVHV-UHFFFAOYSA-N		Interactions Focus chain C [auth A] Focus chain D [auth A] Focus chain F [auth A] Focus chain P [auth A] Focus chain Q [auth A] Focus chain R [auth A] Interactions & Density Focus chain C [auth A] Focus chain D [auth A] Focus chain F [auth A] Focus chain P [auth A] Focus chain Q [auth A] Focus chain R [auth A]
ACT Query on ACT Download Ideal Coordinates CCD File SDF format, chain O [auth A] MOL2 format, chain O [auth A]	O [auth A]	ACETATE ION C₂ H₃ O₂ QTBSBXVTEAMEQO-UHFFFAOYSA-M		Interactions Focus chain O [auth A] Interactions & Density Focus chain O [auth A]
CL Query on CL Download Ideal Coordinates CCD File SDF format, chain V [auth A] SDF format, chain W [auth A] MOL2 format, chain V [auth A] MOL2 format, chain W [auth A]	V [auth A], W [auth A]	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M		Interactions Focus chain V [auth A] Focus chain W [auth A] Interactions & Density Focus chain V [auth A] Focus chain W [auth A]