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Ligand-Directed Lab...
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Hederos (Håkansson), SofiaLinköpings universitet,Organisk Kemi,Tekniska högskolan
(författare)
Ligand-Directed Labeling of a Single Lysine Residue in hGST A1-1 Mutants
- Artikel/kapitelEngelska2005
Förlag, utgivningsår, omfång ...
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2005-07-02
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American Chemical Society (ACS),2005
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printrdacarrier
Nummerbeteckningar
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LIBRIS-ID:oai:DiVA.org:liu-13367
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https://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-13367URI
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https://doi.org/10.1021/bc050111tDOI
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https://gup.ub.gu.se/publication/58716URI
Kompletterande språkuppgifter
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Språk:engelska
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Sammanfattning på:engelska
Ingår i deldatabas
Klassifikation
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Ämneskategori:ref swepub-contenttype
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Ämneskategori:art swepub-publicationtype
Anmärkningar
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Previously, we discovered that human glutathione transferase (hGST) A1-1 could be site-specifically acylated on a tyrosine residue (Y9) to form ester products using thiolesters of glutathione (GS-thiolesters) as acylating reagents. Out of a total of 20 GS-thiolester reagents tested, 15 (75%) are accepted by hGST A1-1 and thus this is a very versatile reaction. The present investigation was aimed at obtaining a more stable product, an amide bond, between the acyl group and the protein, in order to further increase the value of the reaction. Three lysine mutants (Y9K, A216K, and Y9F/A216K) were therefore prepared and screened against a panel of 18 GS-thiolesters. The Y9K mutant did not react with any of the reagents. The double mutant Y9F/A216K reacted with only one reagent, but in contrast, the A216K mutant could be acylated at the introduced lysine 216 with eight (44%) of the GS-thiolesters. The reaction can take place in the presence of glutathione and even in a crude cell lysate for five (28%) of the reagents. Through the screening process we obtained some basic rules relating to reagent requirements. We have thus produced a mutant (A216K) that can be rapidly and site-specifically modified at a lysine residue to form a stable amide linkage with a range of acyl groups. One of the successful reagents is a fluorophore that potentially can be used in downstream protein purification and protein fusion applications.
Ämnesord och genrebeteckningar
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NATURVETENSKAP Kemi hsv//swe
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NATURAL SCIENCES Chemical Sciences hsv//eng
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human GST A1-1
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site-specific covalent modification
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tyrosine 9
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alanine 216
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lysine mutant
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pre-programmed
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ligand-directed protein modification
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intramolecular acyl-transfer reaction
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NATURAL SCIENCES
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NATURVETENSKAP
Biuppslag (personer, institutioner, konferenser, titlar ...)
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Karlsson, BeatriceLinköpings universitet,Institutionen för fysik, kemi och biologi,Tekniska högskolan(Swepub:liu)beaka29
(författare)
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Tegler, Lotta
(författare)
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Kerstin S., BrooGothenburg University,Göteborgs universitet,Linköpings universitet,Organisk Kemi,Tekniska högskolan,Institutionen för kemi,Department of Chemistry(Swepub:gu)xbroke
(författare)
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Linköpings universitetOrganisk Kemi
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:Bioconjugate chemistry: American Chemical Society (ACS)16:4, s. 1009-10181043-18021520-4812
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