CD.10

ALPHA-2,3/2,6-SIALYLTRANSFERASE/SIALIDASE

PDB

The ligand-free form

2ex0_B [Alignment: 1]

The ligand-bound form

2ihz_A[Alignment: 1]

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Animations of

the structural change



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An image of the result of

the linear response theory


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Function

EC*1

CSA distance*2

2.4.99.4

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

Ligand

PDB*1

Full name

CSF,LBT

CMP-3FNEUAC,ALPHA-LACTOSE

*1 Ligand name designated by the PDB identifiers.

Segments

Component No.

Fixed*1

Moving*1

Motion type

Ligand binding

Coupled motion type

1

D1(27A-248A,332A-335A,393A-396A)

D2(249A-331A,336A-373A,383A-392A,397A-410A)

Domain

Coupled

Closure

2

D2

L3(374A-383A)

Local

Independent

3

D2

L4(270A-274A)

Local

Coupled

Closure

*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

3.6

2

Yes

-9

3

8.2

+1

*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.

Linear response

Component No.

Correlation coefficient*1

1

0.88

2

3

0.69

*1 The correlation coefficient between the displacement vector predicted by the linear response theory and the one observed in the crystal structures.

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