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1NKH

Crystal structure of Lactose synthase complex with UDP and Manganese

Replaces:  1J8X
Entity
Entity IDChain IDDescriptionTypeChain lengthFormula weightNumber of moleculesDB Name (Accession)Biological sourceDescriptive keywords
1A, C
(A, C)
ALPHA-LACTALBUMINpolymer12314015.82UniProt (P29752)
Pfam (PF00062)
Mus musculus (house mouse)LACTALBUMIN, ALPHA
2B, D
(B, D)
BETA-1,4-GALACTOSYLTRANSFERASEpolymer28632851.62UniProt (P08037)
Pfam (PF13733)
Pfam (PF02709)
Bos taurus (cattle)B4GAL-T1; BETA4GAL-T1; BETA-1,4-GALTASE 1; BETA-1,4-GALACTOSYLTRANSFERASE 1; UDP-GALACTOSE:BETA-N-ACETYLGLUCOSAMINE BETA-1,4-GALACTOSYLTRANSFERASE 1
3E, M
(A, C)
CALCIUM IONnon-polymer40.12Chemie (CA)
PubChem (271)
4F, P
(A, D)
SULFATE IONnon-polymer96.12Chemie (SO4)
5G, K, L, N, S
(A, B, C, D)
TETRAETHYLENE GLYCOLnon-polymer194.25Chemie (PG4)
PubChem (8200)
6H, O
(B, D)
MANGANESE (II) IONnon-polymer54.92Chemie (MN)
PubChem (27854)
7I, J, Q, R
(B, D)
URIDINE-5'-DIPHOSPHATEnon-polymer404.24Chemie (UDP)
PubChem (1158)
PubChem (6031)
PubChem (3084486)
PubChem (6101632)
PubChem (6604175)
PubChem (11811538)
PubChem (12049241)
PubChem (25323044)
PubChem (25323048)
PubChem (44298965)
PubChem (57448939)
PubChem (53486216)
PubChem (60098857)
PubChem (91746160)
PubChem (92332560)
PubChem (92332561)
PubChem (92332562)
PubChem (92332563)
PubChem (93088131)
PubChem (93630083)
8T, U, V, W
(A, B, C, D)
waterwater18.0608Chemie (HOH)
Sequence modifications
B, D: 130 - 402 (UniProt: P08037)
PDBExternal DatabaseDetails
Ala 117-SEE REMARK 999
Ser 118-SEE REMARK 999
Met 119-SEE REMARK 999
Thr 120-SEE REMARK 999
Gly 121-SEE REMARK 999
Gly 122-SEE REMARK 999
Gln 123-SEE REMARK 999
Gln 124-SEE REMARK 999
Met 125-SEE REMARK 999
Gly 126-SEE REMARK 999
Arg 127-SEE REMARK 999
Gly 128-SEE REMARK 999
Ser 129-SEE REMARK 999
Sequence viewer
Contents of the asymmetric unit
PolymersNumber of chains4
Total formula weight93734.9
Non-Polymers*Number of molecules15
Total formula weight2969.9
All*Total formula weight96704.8
*Water molecules are not included.

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PDB entries from 2026-04-08

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