1QPK

MUTANT (D193G) MALTOTETRAOSE-FORMING EXO-AMYLASE IN COMPLEX WITH MALTOTETRAOSE

• PDB DOI: https://doi.org/10.2210/pdb1QPK/pdb

• Classification: HYDROLASE
• Organism(s): Stutzerimonas stutzeri
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 1999-05-26 Released: 1999-11-17 
• Deposition Author(s): Yoshioka, Y., Hasegawa, K., Matsuura, Y., Katsube, Y., Kubota, M.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Observed: 0.178 

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 47.27 kDa 
• Atom Count: 3,513 
• Modelled Residue Count: 418 
• Deposited Residue Count: 418 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
PROTEIN (MALTOTETRAOSE-FORMING AMYLASE)	A	418	Stutzerimonas stutzeri	Mutation(s): 1
UniProt
Find proteins for P13507 (Stutzerimonas stutzeri) Explore P13507  Go to UniProtKB:  P13507

Oligosaccharides

Help

Entity ID: 2
Molecule	Chains	Length	2D Diagram	Glycosylation	3D Interactions
alpha-D-glucopyranose-(1-4)-alpha-D-glucopyranose-(1-4)-alpha-D-glucopyranose-(1-4)-alpha-D-glucopyranose	B	4		N/A
Glycosylation Resources
GlyTouCan:  G87171PZ GlyCosmos:  G87171PZ GlyGen:  G87171PZ

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
CA	C [auth A], D [auth A]	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N

Biologically Interesting Molecules (External Reference) 1 Unique

Entity ID: 2
ID	Chains	Name	Type/Class	2D Diagram	3D Interactions
PRD_900010	B	alpha-maltotetraose	Oligosaccharide / Substrate analog

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Observed: 0.178 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 63.21	α = 90
b = 167.5	β = 90
c = 46.72	γ = 90

Software Package:

Software Name	Purpose
PHASER	phasing
PROFFT	refinement

Structure Validation

Entry History 

Deposition Data

• Released Date: 1999-11-17 
Deposition Author(s): Yoshioka, Y., Hasegawa, K., Matsuura, Y., Katsube, Y., Kubota, M.

Revision History  

• Version 1.0: 1999-11-17
  Type: Initial release
  
• Version 1.1: 2008-04-27
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2017-10-04
  Changes: Refinement description
• Version 2.0: 2020-07-29
  Type: Remediation
  Reason: Carbohydrate remediation
  Changes: Atomic model, Data collection, Derived calculations, Non-polymer description, Structure summary
• Version 2.1: 2021-11-03
  Changes: Database references, Structure summary