6h64
From Proteopedia
Crystal structure of the CRD-SAT
Structural highlights
Function[LEG3_HUMAN] Galactose-specific lectin which binds IgE. May mediate with the alpha-3, beta-1 integrin the stimulation by CSPG4 of endothelial cells migration. Together with DMBT1, required for terminal differentiation of columnar epithelial cells during early embryogenesis (By similarity). In the nucleus: acts as a pre-mRNA splicing factor. Involved in acute inflammatory responses including neutrophil activation and adhesion, chemoattraction of monocytes macrophages, opsonization of apoptotic neutrophils, and activation of mast cells.[1] [2] [3] Publication Abstract from PubMedPurification of recombinant proteins remains a bottleneck for downstream processing. The authors engineered a new galectin 3 truncated form (CRDSAT ), functionally and structurally characterized, with preserved solubility and lectinic activity. Taking advantage of these properties, the authors designed an expression vector (pCARGHO), suitable for CRDSAT -tagged protein expression in prokaryotes. CRDSAT binds to lactose-Sepharose with a high specificity and facilitates solubilization of fusion proteins. This tag is structurally stable and can be easily removed from fusion proteins using TEV protease. Furthermore, due to their basic isoelectric point (pI), CRDSAT , and TEV are efficiently eliminated using cationic exchange chromatography. When pI of the protein of interest (POI) and CRDSAT are close, other chromatographic methods are successfully tested. Using CRDSAT tag, the authors purified several proteins from prokaryote and eukaryote origin and demonstrated as examples, the preservation of both Escherichia coli Thioredoxin 1 and human CDC25Bcd activities. Overall, yields of proteins obtained after tag removal are about 5-50 mg per litre of bacterial culture. Our purification method displays various advantages described herein that may greatly interest academic laboratories, biotechnology, and pharmaceutical companies. CRDSAT Generated by pCARGHO: A New Efficient Lectin-Based Affinity Tag Method for Safe, Simple, and Low-Cost Protein Purification.,Kriznik A, Yelehe-Okouma M, Lec JC, Groshenry G, Le Cordier H, Charron C, Quinternet M, Mazon H, Talfournier F, Boschi-Muller S, Jouzeau JY, Reboul P Biotechnol J. 2019 Apr;14(4):e1800214. doi: 10.1002/biot.201800214. Epub 2018 Oct, 18. PMID:30298550[4] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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