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Calcium in PDB 1nqi: Crystal Structure of Lactose Synthase, A 1:1 Complex Between BETA1,4- Galactosyltransferase and Alpha-Lactalbumin in the Presence of Glcnac

Enzymatic activity of Crystal Structure of Lactose Synthase, A 1:1 Complex Between BETA1,4- Galactosyltransferase and Alpha-Lactalbumin in the Presence of Glcnac

All present enzymatic activity of Crystal Structure of Lactose Synthase, A 1:1 Complex Between BETA1,4- Galactosyltransferase and Alpha-Lactalbumin in the Presence of Glcnac:
2.4.1.22; 2.4.1.38; 2.4.1.90;

Protein crystallography data

The structure of Crystal Structure of Lactose Synthase, A 1:1 Complex Between BETA1,4- Galactosyltransferase and Alpha-Lactalbumin in the Presence of Glcnac, PDB code: 1nqi was solved by B.Ramakrishnan, P.K.Qasba, with X-Ray Crystallography technique. A brief refinement statistics is given in the table below:

Resolution Low / High (Å) 24.50 / 2.00
Space group P 1 21 1
Cell size a, b, c (Å), α, β, γ (°) 57.161, 96.379, 99.480, 90.00, 100.98, 90.00
R / Rfree (%) 21 / 25.8

Calcium Binding Sites:

The binding sites of Calcium atom in the Crystal Structure of Lactose Synthase, A 1:1 Complex Between BETA1,4- Galactosyltransferase and Alpha-Lactalbumin in the Presence of Glcnac (pdb code 1nqi). This binding sites where shown within 5.0 Angstroms radius around Calcium atom.
In total 2 binding sites of Calcium where determined in the Crystal Structure of Lactose Synthase, A 1:1 Complex Between BETA1,4- Galactosyltransferase and Alpha-Lactalbumin in the Presence of Glcnac, PDB code: 1nqi:
Jump to Calcium binding site number: 1; 2;

Calcium binding site 1 out of 2 in 1nqi

Go back to Calcium Binding Sites List in 1nqi
Calcium binding site 1 out of 2 in the Crystal Structure of Lactose Synthase, A 1:1 Complex Between BETA1,4- Galactosyltransferase and Alpha-Lactalbumin in the Presence of Glcnac


Mono view


Stereo pair view

A full contact list of Calcium with other atoms in the Ca binding site number 1 of Crystal Structure of Lactose Synthase, A 1:1 Complex Between BETA1,4- Galactosyltransferase and Alpha-Lactalbumin in the Presence of Glcnac within 5.0Å range:
probe atom residue distance (Å) B Occ
A:Ca124

b:18.1
occ:1.00
 O A:LYS79 2.2 17.6 1.0
O A:GLU84 2.3 17.2 1.0
OD2 A:ASP88 2.3 16.0 1.0
OD1 A:ASP87 2.4 20.1 1.0
O A:HOH913 2.5 17.1 1.0
O A:HOH943 2.5 19.1 1.0
OD1 A:ASP82 2.6 19.2 1.0
CG A:ASP87 3.4 22.2 1.0
CG A:ASP82 3.4 20.1 1.0
CG A:ASP88 3.4 14.2 1.0
C A:GLU84 3.4 19.0 1.0
C A:LYS79 3.5 16.1 1.0
OD2 A:ASP82 3.5 18.4 1.0
OD2 A:ASP87 3.6 21.8 1.0
OD1 A:ASP88 3.8 17.2 1.0
O A:HOH1182 4.1 23.1 1.0
CA A:LEU80 4.1 16.6 1.0
N A:LEU80 4.2 16.1 1.0
CA A:GLU84 4.3 18.9 1.0
N A:GLU84 4.3 19.2 1.0
N A:LEU85 4.4 20.3 1.0
N A:ASP88 4.4 13.9 1.0
CA A:LEU85 4.5 18.6 1.0
CB A:GLU84 4.5 18.2 1.0
N A:ASP82 4.5 19.5 1.0
O A:ASP82 4.5 16.9 1.0
CA A:LYS79 4.6 17.0 1.0
C A:LEU80 4.6 17.8 1.0
CB A:ASP88 4.7 14.5 1.0
CB A:ASP82 4.7 19.4 1.0
C A:ASP82 4.8 20.1 1.0
CB A:ASP87 4.8 19.6 1.0
CB A:LYS79 4.8 16.7 1.0
CD2 A:LEU80 4.8 13.6 1.0
N A:LEU81 4.9 18.5 1.0
N A:ASP87 4.9 19.7 1.0
CA A:ASP82 4.9 18.7 1.0
C A:LEU85 4.9 18.1 1.0

Calcium binding site 2 out of 2 in 1nqi

Go back to Calcium Binding Sites List in 1nqi
Calcium binding site 2 out of 2 in the Crystal Structure of Lactose Synthase, A 1:1 Complex Between BETA1,4- Galactosyltransferase and Alpha-Lactalbumin in the Presence of Glcnac


Mono view


Stereo pair view

A full contact list of Calcium with other atoms in the Ca binding site number 2 of Crystal Structure of Lactose Synthase, A 1:1 Complex Between BETA1,4- Galactosyltransferase and Alpha-Lactalbumin in the Presence of Glcnac within 5.0Å range:
probe atom residue distance (Å) B Occ
C:Ca526

b:18.5
occ:1.00
 O C:GLU84 2.2 17.6 1.0
O C:LYS79 2.3 13.6 1.0
OD1 C:ASP82 2.4 12.6 1.0
OD1 C:ASP87 2.4 19.1 1.0
OD2 C:ASP88 2.5 17.9 1.0
O C:HOH905 2.5 13.6 1.0
O C:HOH902 2.5 11.7 1.0
CG C:ASP82 3.3 17.6 1.0
C C:GLU84 3.3 18.5 1.0
CG C:ASP87 3.4 19.3 1.0
C C:LYS79 3.5 14.5 1.0
CG C:ASP88 3.6 16.6 1.0
OD2 C:ASP87 3.6 15.7 1.0
OD2 C:ASP82 3.7 18.3 1.0
CA C:LEU80 4.1 11.2 1.0
OD1 C:ASP88 4.1 16.1 1.0
N C:LEU85 4.2 18.5 1.0
N C:LEU80 4.3 13.3 1.0
CA C:GLU84 4.3 20.3 1.0
O C:HOH950 4.3 17.0 1.0
N C:GLU84 4.3 19.6 1.0
CA C:LEU85 4.3 17.7 1.0
CB C:GLU84 4.4 21.7 1.0
O C:ASP82 4.4 18.3 1.0
N C:ASP82 4.4 18.7 1.0
N C:ASP88 4.5 15.5 1.0
C C:LEU80 4.6 12.6 1.0
CB C:ASP82 4.6 18.0 1.0
CA C:LYS79 4.6 13.7 1.0
C C:ASP82 4.7 19.9 1.0
CB C:ASP87 4.8 17.4 1.0
CA C:ASP82 4.8 19.0 1.0
C C:LEU85 4.8 17.3 1.0
N C:ASP87 4.8 17.1 1.0
CB C:ASP88 4.9 15.3 1.0
CD2 C:LEU80 4.9 6.8 1.0
N C:LEU81 4.9 15.7 1.0
CD1 C:LEU85 4.9 21.5 1.0
CB C:LYS79 5.0 13.8 1.0

Reference:

B.Ramakrishnan, P.K.Qasba. Crystal Structure of Lactose Synthase Reveals A Large Conformational Change in Its Catalytic Component, the Beta-1,4-Galactosyltransferase J.Mol.Biol. V. 310 205 2001.
ISSN: ISSN 0022-2836
PubMed: 11419947
DOI: 10.1006/JMBI.2001.4757
Page generated: Mon Jul 7 17:39:01 2025

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