Amino acid selective labeling and unlabeling for protein resonance assignments

Garima Jaipuria, B. Krishnarjuna, Somnath Mondal, Abhinav Dubey, Hanudatta S. Atreya

Research output: Chapter in Book/Report/Conference proceedingChapter (Book)Researchpeer-review

27 Citations (Scopus)


Structural characterization of proteins by NMR spectroscopy begins with the process of sequence specific resonance assignments in which the 1H, 13C and 15N chemical shifts of all backbone and side-chain nuclei in the polypeptide are assigned. This process requires different isotope labeled forms of the protein together with specific experiments for establishing the sequential connectivity between the neighboring amino acid residues. In the case of spectral overlap, it is useful to identify spin systems corresponding to the different amino acid types selectively. With isotope labeling this can be achieved in two ways: (i) amino acid selective labeling or (ii) amino acid selective 'unlabeling'. This chapter describes both these methods with more emphasis on selective unlabeling describing the various practical aspects. The recent developments involving combinatorial selective labeling and unlabeling are also discussed.

Original languageEnglish
Title of host publicationIsotope labeling in Biomolecular NMR
EditorsHanudatta S. Atreya
Place of PublicationDordrecht Netherlands
Number of pages24
ISBN (Electronic)9789400749542
ISBN (Print)9789400749535
Publication statusPublished - 2012
Externally publishedYes

Publication series

NameAdvances in Experimental Medicine and Biology
ISSN (Print)0065-2598

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