SMTL ID : 1o23.2 (1 other biounit)

CRYSTAL STRUCTURE OF LACTOSE SYNTHASE IN THE PRESENCE OF UDP-GLUCOSE

Coordinates

PDB Format

Method

X-RAY DIFFRACTION 2.32 Å

Oligo State

hetero-oligomer

Ligands

1 x CA: CALCIUM ION(Non-covalent)

CA.1: 5 residues within 4Å: Chain A: K.79, D.82, E.84, D.87, D.88 5 PLIP interactions: 4 interactions with chain A, 1 Ligand-Water interactions Metal complexes: A:K.79, A:E.84, A:D.87, A:D.88, H2O.10

1 x MN: MANGANESE (II) ION(Non-covalent)

MN.2: 4 residues within 4Å: Chain B: D.138, M.228, H.231 Ligands: UPG.3 3 PLIP interactions: 2 interactions with chain B, 1 Ligand-Water interactions Metal complexes: B:D.138, B:H.231, H2O.90

1 x UPG: URIDINE-5'-DIPHOSPHATE-GLUCOSE(Non-covalent)

UPG.3: 22 residues within 4Å: Chain B: P.71, F.72, R.73, R.75, F.110, R.112, D.136, V.137, D.138, L.139, Y.173, G.175, G.176, W.198, G.199, E.201, D.202, M.228, H.231, D.234, N.237 Ligands: MN.2 22 PLIP interactions: 22 interactions with chain B Hydrogen bonds: B:P.71, B:R.73, B:R.73, B:R.75, B:R.112, B:D.136, B:D.136, B:V.137, B:Y.173, B:Y.173, B:G.176, B:G.199 Water bridges: B:K.163, B:G.197, B:G.199, B:D.234, B:N.237 Salt bridges: B:R.75, B:H.231, B:H.231 pi-Stacking: B:F.110 pi-Cation interactions: B:R.75

1 x UDP: URIDINE-5'-DIPHOSPHATE(Non-covalent)

UDP.4: 9 residues within 4Å: Chain B: L.39, K.40, Q.76, Q.270, Y.272, P.273, L.274, Y.275, K.277 16 PLIP interactions: 16 interactions with chain B Hydrophobic interactions: B:L.39, B:Y.272, B:Y.275 Hydrogen bonds: B:E.43, B:E.43, B:Q.76, B:Y.272, B:Y.272, B:L.274 Water bridges: B:Q.76, B:Q.76, B:Q.76, B:K.277, B:K.277 Salt bridges: B:K.277, B:K.277

1 x PG4: TETRAETHYLENE GLYCOL(Non-functional Binders)

PG4.5: 10 residues within 4Å: Chain A: F.31, H.32, T.33, S.34, G.35, A.40 Chain B: F.164, W.198, R.233, R.243 6 PLIP interactions: 4 interactions with chain A, 2 interactions with chain B Water bridges: A:E.2, A:V.41, A:V.41, A:V.41, B:R.243 Hydrogen bonds: B:R.233

Links

RCSB   PDBe   PDBe-KB   PDBj   PDBsum   CATH   PLIP

Citation

Ramakrishnan, B. et al., Alpha-Lactalbumin (La) Stimulates Milk Beta-1,4-Galactosyltransferase I (Beta 4Gal-T1) to Transfer Glucose from Udp-Glucose to N-Acetylglucosamine. Crystal Structure of Beta 4Gal-T1 X La Complex with Udp-Glc. J.Biol.Chem. (2001)

Release Date

2003-02-25

Peptides

ALPHA-LACTALBUMIN: A
BETA-1,4-GALACTOSYLTRANSFERASE: B

SMTL:PDB

SMTL Chain Id:
PDB Chain Id:

A
C

B
D

ALPHA-LACTALBUMIN

BETA-1,4-GALACTOSYLTRANSFERASE

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