3OIH | pdb_00003oih

Crystal Structure of the complex of xylanase-alpha-amylase inhibitor Protein (XAIP-I) with trehalose at 1.87 A resolution

• PDB DOI: https://doi.org/10.2210/pdb3OIH/pdb

• Classification: HYDROLASE INHIBITOR
• Organism(s): Scadoxus multiflorus
• Mutation(s): No 


• Deposited: 2010-08-19 Released: 2010-09-22 
• Deposition Author(s): Kumar, M., Kumar, S., Sinha, M., Kaur, P., Sharma, S., Singh, T.P.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.87 Å
• R-Value Free: 
  0.211 (Depositor), 0.210 (DCC) 
• R-Value Work: 
  0.186 (Depositor), 0.190 (DCC) 
• R-Value Observed: 
  0.187 (Depositor) 

Starting Model: experimental

Literature

Crystal Structure of the complex of xylanase-alpha-amylase inhibitor Protein (XAIP-I) with trehalose at 1.87 A resolution

Kumar, M., Kumar, S., Sinha, M., Kaur, P., Sharma, S., Singh, T.P.

To be published.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content 

• Total Structure Weight: 30.43 kDa 
• Atom Count: 2,390 
• Modeled Residue Count: 272 
• Deposited Residue Count: 272 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Haementhin	A	272	Scadoxus multiflorus	Mutation(s): 0  EC: 3.2.1.14
UniProt
Find proteins for B2ZGS7 (Scadoxus multiflorus) Explore B2ZGS7  Go to UniProtKB:  B2ZGS7

Oligosaccharides

Help

Entity ID: 2
Molecule	Chains	Length	2D Diagram	Glycosylation	3D Interactions
alpha-D-glucopyranose-(1-1)-alpha-D-glucopyranose	B	2		N/A
Glycosylation Resources
GlyTouCan:  G92130SN GlyCosmos:  G92130SN

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
PO4	C [auth A]	PHOSPHATE ION O4 P NBIIXXVUZAFLBC-UHFFFAOYSA-K
ACT	D [auth A], E [auth A], F [auth A]	ACETATE ION C2 H3 O2 QTBSBXVTEAMEQO-UHFFFAOYSA-M

Biologically Interesting Molecules (External Reference) 1 Unique

Entity ID: 2
ID	Chains	Name	Type/Class	2D Diagram	3D Interactions
PRD_900006	B	trehalose	Oligosaccharide / Nutrient

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.87 Å
• R-Value Free:  0.211 (Depositor), 0.210 (DCC) 
• R-Value Work:  0.186 (Depositor), 0.190 (DCC) 
• R-Value Observed: 0.187 (Depositor) 

Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 42.238	α = 90
b = 64.677	β = 102.33
c = 48.852	γ = 90

Software Package:

Software Name	Purpose
HKL-2000	data collection
AMoRE	phasing
REFMAC	refinement
DENZO	data reduction
SCALEPACK	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2010-09-22 
Deposition Author(s): Kumar, M., Kumar, S., Sinha, M., Kaur, P., Sharma, S., Singh, T.P.

Revision History  

• Version 1.0: 2010-09-22
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance
• 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: 2023-11-01
  Changes: Data collection, Database references, Refinement description, Structure summary
• Version 2.2: 2024-10-09
  Changes: Structure summary