1Q4N

Structural studies of Phe256Trp of human salivary alpha-amylase: implications for the role of a conserved water molecule and its associated chain in enzyme activity

Structural Biology Knowledgebase: 1Q4N SBKB.org


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.07 Å
  • R-Value Free: 0.206
  • R-Value Work: 0.156

wwPDB Validation Full Report


Literature

Macromolecules
Sequence Display for 1Q4N

Classification: HYDROLASE

Total Structure Weight: 56233.65

Macromolecule Entities
Molecule Chains Length Organism Details
Alpha-amylase, salivary X 496 Homo sapiens EC#: 3.2.1.1 IUBMB
Mutation: Q1X, F256W
Gene Name(s): AMY1A Gene View AMY1 AMY1B Gene View AMY1C Gene View

Small Molecules
Ligands 3 Unique
ID Chains Name / Formula / InChI Key 2D Diagram 3D Interactions
TAM
Query on TAM

X TRIS(HYDROXYETHYL)AMINOMETHANE
C7 H17 N O3
GKODZWOPPOTFGA-UHFFFAOYSA-N
Ligand Explorer
 
Binding Pocket (JSmol)
 
Electron Density (JSmol)
CA
Query on CA

X CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
Ligand Explorer
 
Binding Pocket (JSmol)
 
Electron Density (JSmol)
CL
Query on CL

X CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
Ligand Explorer
 
Binding Pocket (JSmol)
 
Electron Density (JSmol)
Modified Residues 1 Unique
ID Chains Type Formula 2D Diagram Parent
PCA
Query on PCA
X L-PEPTIDE LINKING C5 H7 N O3 GLU

Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.07 Å
  • R-Value Free: 0.206
  • R-Value Work: 0.156
  • Space Group: P 21 21 21
  • Electron Density Server: EDS EDS

Unit Cell:

Length (Å) Angle (°)
a = 51.90 α = 90.00
b = 74.20 β = 90.00
c = 134.82 γ = 90.00

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History

Deposition Data

  • Deposited Date: 2003-08-04
  • Released Date: 2004-03-16
  • Deposition author(s): Ramasubbu, N.

Revision History

  • 2011-07-13
    Type: Version format compliance | Details: compliance with PDB Exchange Dictionary V4