1AAP

X-RAY CRYSTAL STRUCTURE OF THE PROTEASE INHIBITOR DOMAIN OF ALZHEIMER'S AMYLOID BETA-PROTEIN PRECURSOR

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.5 Å

wwPDB Validation 3D Report Full Report


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

Literature

X-ray crystal structure of the protease inhibitor domain of Alzheimer's amyloid beta-protein precursor.

Hynes, T.R., Randal, M., Kennedy, L.A., Eigenbrot, C., Kossiakoff, A.A.

(1990) Biochemistry 29: 10018-10022


  • PubMed Abstract: 

    • Alzheimer's amyloid beta-protein precursor contains a Kunitz protease inhibitor domain (APPI) potentially involved in proteolytic events leading to cerebral amyloid deposition. To facilitate the identification of the physiological target of the inhib ...

    Alzheimer's amyloid beta-protein precursor contains a Kunitz protease inhibitor domain (APPI) potentially involved in proteolytic events leading to cerebral amyloid deposition. To facilitate the identification of the physiological target of the inhibitor, the crystal structure of APPI has been determined and refined to 1.5-A resolution. Sequences in the inhibitor-protease interface of the correct protease target will reflect the molecular details of the APPI structure. While the overall tertiary fold of APPI is very similar to that of the Kunitz inhibitor BPTI, a significant rearrangement occurs in the backbone conformation of one of the two protease binding loops. A number of Kunitz inhibitors have similar loop sequences, indicating the structural alteration is conserved and potentially an important determinant of inhibitor specificity. In a separate region of the protease binding loops, APPI side chains Met-17 and Phe-34 create an exposed hydrophobic surface in place of Arg-17 and Val-34 in BPTI. The restriction this change places on protease target sequences is seen when the structure of APPI is superimposed on BPTI complexed to serine proteases, where the hydrophobic surface of APPI faces a complementary group of nonpolar side chains on kallikrein A versus polar side chains on trypsin.

    Organizational Affiliation: 

    Protein Engineering Department, Genentech Inc., South San Francisco, California 94080.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ALZHEIMER'S DISEASE AMYLOID A4 PROTEIN
A, B
58Homo sapiensMutation(s): 0 
Gene Names: APP (A4, AD1)
Find proteins for P05067 (Homo sapiens)
Go to Gene View: APP
Go to UniProtKB:  P05067
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.5 Å
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 35.600α = 90.00
b = 38.900β = 90.00
c = 73.600γ = 90.00
Software Package:
Software NamePurpose
PROLSQrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots


View more in-depth experimental data

Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1991-10-15
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance