7MQ6

Tetragonal Maltose Binding Protein in the presence of gold

PDB DOI: https://doi.org/10.2210/pdb7MQ6/pdb

Classification: SUGAR BINDING PROTEIN
Organism(s): Escherichia coli
Expression System: Escherichia coli
Mutation(s): No

Deposited: 2021-05-05 Released: 2021-09-08
Deposition Author(s): Thaker, A., Sirajudeen, L., Simmons, C.R., Nannenga, B.L.
Funding Organization(s): Department of Defense (DOD, United States)

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 2.37 Å
R-Value Free: 0.249
R-Value Work: 0.210
R-Value Observed: 0.212

Starting Model: experimental
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wwPDB Validation 3D Report Full Report

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

Literature

Structure-guided identification of a peptide for bio-enabled gold nanoparticle synthesis.

Thaker, A., Sirajudeen, L., Simmons, C.R., Nannenga, B.L.

(2021) Biotechnol Bioeng 118: 4867-4873

PubMed: 34436761 Search on PubMed
DOI: https://doi.org/10.1002/bit.27927
Primary Citation of Related Structures:
7MQ6, 7MQ7

PubMed Abstract:
In this study, we show that maltose-binding protein (MBP) is capable of facilitating stable gold nanoparticle synthesis, and a structure of MBP in the presence of gold ions was determined by X-ray crystallography. Using this high-resolution structure of gold ion bound MBP, a peptide (AT1) was selected and synthesized and was shown to also aid in the synthesis of stable gold nanoparticles under similar experimental conditions to those used for protein facilitated synthesis. This structure-based approach represents a new potential method for the selection of peptides capable of facilitating stable nanoparticle synthesis.

Organizational Affiliation

Chemical Engineering, School for Engineering of Matter, Transport, and Energy, Arizona State University, Tempe, Arizona, USA.

Macromolecule Content

Total Structure Weight: 42.29 kDa
Atom Count: 2,926
Modelled Residue Count: 373
Deposited Residue Count: 373
Unique protein chains: 1

Macromolecules

Find similar proteins by:

(by identity cutoff) | 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Maltodextrin-binding protein	A	373	Escherichia coli	Mutation(s): 0 Gene Names: malE, GF950_09430
UniProt
Find proteins for P0AEX9 (Escherichia coli (strain K12)) Explore P0AEX9 Go to UniProtKB: P0AEX9
Entity Groups
Sequence Clusters	30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt Group	P0AEX9
Sequence Annotations Expand
Reference Sequence

Oligosaccharides

Help

Entity ID: 2
Molecule	Chains	Length	2D Diagram	Glycosylation	3D Interactions
alpha-D-glucopyranose-(1-4)-beta-D-glucopyranose	B [auth F]	2		N/A	Interactions Focus chain B [auth F] Interactions & Density Focus chain B [auth F]
Glycosylation Resources
GlyTouCan: G66120GK GlyCosmos: G66120GK

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
AU (Subject of Investigation/LOI) Query on AU Download Ideal Coordinates CCD File SDF format, chain C [auth A] MOL2 format, chain C [auth A] mmCIF format, chain C [auth A]	C [auth A]	GOLD ION Au ZBKIUFWVEIBQRT-UHFFFAOYSA-N		Interactions Focus chain C [auth A] Interactions & Density Focus chain C [auth A]
SO4 Query on SO4 Download Ideal Coordinates CCD File SDF format, chain L [auth A] SDF format, chain M [auth A] SDF format, chain N [auth A] SDF format, chain O [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] mmCIF format, chain L [auth A] mmCIF format, chain M [auth A] mmCIF format, chain N [auth A] mmCIF format, chain O [auth A]	L [auth A], M [auth A], N [auth A], O [auth A]	SULFATE ION O₄ S QAOWNCQODCNURD-UHFFFAOYSA-L		Interactions Focus chain L [auth A] Focus chain M [auth A] Focus chain N [auth A] Focus chain O [auth A] Interactions & Density Focus chain L [auth A] Focus chain M [auth A] Focus chain N [auth A] Focus chain O [auth A]
CL Query on CL Download Ideal Coordinates CCD File SDF format, chain D [auth A] SDF format, chain E [auth A] SDF format, chain F [auth A] SDF format, chain G [auth A] SDF format, chain H [auth A] SDF format, chain I [auth A] SDF format, chain J [auth A] SDF format, chain K [auth A] MOL2 format, chain D [auth A] MOL2 format, chain E [auth A] MOL2 format, chain F [auth A] MOL2 format, chain G [auth A] MOL2 format, chain H [auth A] MOL2 format, chain I [auth A] MOL2 format, chain J [auth A] MOL2 format, chain K [auth A] mmCIF format, chain D [auth A] mmCIF format, chain E [auth A] mmCIF format, chain F [auth A] mmCIF format, chain G [auth A] mmCIF format, chain H [auth A] mmCIF format, chain I [auth A] mmCIF format, chain J [auth A] mmCIF format, chain K [auth A]	D [auth A] E [auth A] F [auth A] G [auth A] H [auth A] D [auth A], E [auth A], F [auth A], G [auth A], H [auth A], I [auth A], J [auth A], K [auth A]	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M		Interactions Focus chain D [auth A] Focus chain E [auth A] Focus chain F [auth A] Focus chain G [auth A] Focus chain H [auth A] Focus chain I [auth A] Focus chain J [auth A] Focus chain K [auth A] Interactions & Density Focus chain D [auth A] Focus chain E [auth A] Focus chain F [auth A] Focus chain G [auth A] Focus chain H [auth A] Focus chain I [auth A] Focus chain J [auth A] Focus chain K [auth A]

Biologically Interesting Molecules (External Reference) 1 Unique

Entity ID: 2
ID	Chains	Name	Type/Class	2D Diagram	3D Interactions
PRD_900018 Query on PRD_900018	B [auth F]	beta-maltose	Oligosaccharide / Nutrient		Interactions Focus chain B [auth F] Interactions & Density Focus chain B [auth F]