1IS4

LACTOSE-LIGANDED CONGERIN II

• PDB DOI: https://doi.org/10.2210/pdb1IS4/pdb

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


• Deposited: 2001-11-12 Released: 2002-09-18 
• Deposition Author(s): Shirai, T., Matsui, Y., Shionyu-Mitsuyama, C., Yamane, T., Kamiya, H., Ishii, C., Ogawa, T., Muramoto, K.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Free: 0.217 
• R-Value Work: 0.166 
• R-Value Observed: 0.167 

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 15.7 kDa 
• Atom Count: 1,192 
• Modelled Residue Count: 134 
• Deposited Residue Count: 135 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
CONGERIN II	A	135	Conger myriaster	Mutation(s): 0
UniProt
Find proteins for Q9YIC2 (Conger myriaster) Explore Q9YIC2  Go to UniProtKB:  Q9YIC2

Oligosaccharides

Help

Entity ID: 2
Molecule	Chains	Length	2D Diagram	Glycosylation	3D Interactions
beta-D-galactopyranose-(1-4)-beta-D-glucopyranose	B	2		N/A
Glycosylation Resources
GlyTouCan:  G84224TW GlyCosmos:  G84224TW GlyGen:  G84224TW

Biologically Interesting Molecules (External Reference) 1 Unique

Entity ID: 2
ID	Chains	Name	Type/Class	2D Diagram	3D Interactions
PRD_900004	B	beta-lactose	Oligosaccharide / Nutrient

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Free: 0.217 
• R-Value Work: 0.166 
• R-Value Observed: 0.167 
• Space Group: P 4₂ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 61.4	α = 90
b = 61.4	β = 90
c = 80.7	γ = 90

Software Package:

Software Name	Purpose
AMoRE	phasing
X-PLOR	refinement
DENZO	data reduction
SCALEPACK	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2002-09-18 
Deposition Author(s): Shirai, T., Matsui, Y., Shionyu-Mitsuyama, C., Yamane, T., Kamiya, H., Ishii, C., Ogawa, T., Muramoto, K.

Revision History  

• Version 1.0: 2002-09-18
  Type: Initial release
  
• Version 1.1: 2008-04-27
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Non-polymer description, 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: 2023-12-27
  Changes: Data collection, Database references, Structure summary
• Version 2.2: 2024-04-03
  Changes: Refinement description