ID.18

TAQ DNA POLYMERASE

PDB

The ligand-free form

1cmw_A [Alignment: 1]

The ligand-bound form

1taq_A[Alignment: 1]

View

Animations of

the structural change



Using Jmol

Function

EC*1

CSA distance*2

2.7.7.7

*1 Enzyme commission number.
*2 The distance between the active site annotated in CSA23 and the ligand-binding sites.

Ligand

PDB*1

Full name

BGL,ZN

B-2-OCTYLGLUCOSIDE,ZINC ION

*1 Ligand name designated by the PDB identifiers.

Segments

Component No.

Fixed*1

Moving*1

Motion type

Ligand binding

Coupled motion type

1

D1(293A-464A,470A-574A,578A-596A,598A-830A)

D2(12A-68A,85A-288A)

Domain

Independent

2

D1

L3(465A-469A)

Local

Independent

3

D2

L4(68A-89A)

Local

Independent

*1 The location of the fixed and moving segments indicated by the residue number assigned in the ligand-bound form. The background color of characters indicates the corresponding segment in the structure. The colored segments not described in the Table are: 1) a part of component in which the motion is small (< 1.0 A), or, 2) a part of a protomer of homodimers, for which a corresponding part of the other protomer is shown in the Table.

Displacement and disorder

Component No.

RMSD*1

Displacement*2

Disorder-order transition*3

Disorder residue*4

Helix-Coil*5

1

31.8

2

Yes

+5

3

Yes

-16

-4

*1 The root-mean-square displacement of a component of motion calculated for the domain motions.
*2 The mean displacement of a component of motion calculated for the local motions.
*3 Order-disorder transition: Whether the open form contains the disordered structure.
*4 The number of disordered residues.
*5 The number of residues exhibiting the alpha-helix to coil transition.

Crystal environment

Component No.

Open state*1

Crystal packing*2

1

Bound

Coupled

2

3

Free

Coupled

*1 Distinction between the open state and the closed state required for examining the influence of the crystal environment.
*2 Crystal packing: Whether the change in the crystal environment is coupled with the structural change.

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