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| <StructureSection load='1v6i' size='350' side='right' caption='Structure of peanut galactose-binding lectin tetramer complex with β-D-galactose, α-D-glucose, Ca+2 (green) and Mn+2 (purple) ions (PDB entry [[1v6i]])' scene='57/572274/Cv/1'> | | <StructureSection load='' size='350' side='right' caption='Structure of peanut galactose-binding lectin tetramer complex with β-D-galactose, α-D-glucose, Ca+2 (green) and Mn+2 (purple) ions (PDB entry [[1v6i]])' scene='57/572274/Cv/1'> |
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| == Function == | | == Function == |
Revision as of 11:18, 20 October 2017
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Function
Galactose-binding lectin (GBL) is a lectin which binds the carbohydrate sequence Gal-β(1,3)-GalNac. GBL is an all beta-sheet protein[1].
Relevance
GBL is used in affinity columns for capturing proteins which are glycosylated with Gal-β(1,3)-GalNac.
Structural highlights
The carbohydrate ligand binds to 3 loops[2]. β-D-galactose/α-D-glucose binding site in peanut galactose-binding lectin (PDB entry 1v6i).
Ca coordination site.
Mn coordination site. Water molecules shown as red spheres.
- ↑ Natchiar SK, Srinivas O, Mitra N, Surolia A, Jayaraman N, Vijayan M. Structural studies on peanut lectin complexed with disaccharides involving different linkages: further insights into the structure and interactions of the lectin. Acta Crystallogr D Biol Crystallogr. 2006 Nov;62(Pt 11):1413-21. Epub 2006, Oct 18. PMID:17057347 doi:10.1107/S0907444906035712
- ↑ Kundhavai Natchiar S, Arockia Jeyaprakash A, Ramya TN, Thomas CJ, Suguna K, Surolia A, Vijayan M. Structural plasticity of peanut lectin: an X-ray analysis involving variation in pH, ligand binding and crystal structure. Acta Crystallogr D Biol Crystallogr. 2004 Feb;60(Pt 2):211-9. Epub 2004, Jan 23. PMID:14747696 doi:https://dx.doi.org/10.1107/S090744490302849X
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3D structures of galactose-binding lectin
Updated on 20-October-2017
{"openlevels":0}
- Peanut GBL
- Peanut GBL binary complex
- 1qf3 – GBL + methyl-β-galactose
- 2dv9, 2dvd – GBL + β-D-galactose
- 1rir – GBL + porphyrin derivative
- Peanut GBL ternary complex
- 1v6i, 1v6j, 1v6k, 1cr7, 2dvg – GBL + β-D-galactose + α-D-glucose
- 2pel – GBL + β-lactose + α-lactose
- 2tep, 2dva, 2dvb – GBL + β-D-galactose + N-acetyl-D-galactosamine
- 1ciw – GBL + β-D-galactose + 2-acetylamino-2-deoxy-D-glucopyranose
- 1rit – GBL + porphyrin derivative + β-lactose
- Peanut GBL quaternary complex
- 1bzw, 1v6l – GBL + β-D-galactose + α-D-glucose + β-D-glucose
- Pseudomonas aeruginosa GBL
- PaGBL binary complex
- 2wyf – GBL + methyl-β-galactose
- 4ljh – GBL + β-D-galactose
- 3zyf, 4a6s – GBL + galactopyranose derivative
- PaGBL ternary complex
- 3zyh – GBL + galactopyranose derivative + gal-lys-pro-leu
- 3zyb – GBL + β-D-galactose + gal-lys-pro-leu
- 4lk6 – GBL + β-D-galactose + chlorophenol red
- 4lk7 – GBL + β-D-galactose + resorufin
- 1oko – GBL + β-D-galactose + α-D-galactose
- 4al9 – GBL + α-D-galactose + α-D-glucose
- PaGBL quaternary complex
- 2vxj – GBL + β-D-galactose + α-D-galactose + α-D-glucose + β-D-glucose
- Lumbricus terrestris GBL
- 2dry – LtGBL C terminal (mutant) – Lumbricus terrestris
- 2rst – LtGBL C terminal
- 2drz – LtGBL C terminal (mutant) + lactose
- 2zqn – LtGBL C terminal + lactose
- 2ds0 – LtGBL C terminal (mutant) + sialyllactose
- 2zqo – LtGBL C terminal + GalNac
References
proteopedia link