Advanced

N-Terminal tagged lactate dehydrogenase proteins: evaluation of relative hydrophobicity by hydrophobic interaction chromatography and aqueous two-phase system partition

Fexby, Sara LU ; Ihre, H; Van Alstine, J and Bülow, Leif LU (2004) In Journal of Chromatography. B 807(1). p.25-31
Abstract
The hydrophobic contributions of 17 individual peptides, fused to the N-terminal of Bacillus stearothermophilus lactate dehydrogenase (LDH) were studied by hydrophobic interaction chromatography (HIC) and aqueous two-phase system (ATPS). The constructs were sequenced from a protein library designed with a five-amino acid randomised region in the N-terminal of an LDH protein. The 17 LDH variants and an LDH control lacking the randomised region were expressed in Escherichia coli. HIC and ATPS behaviour of the proteins indicated significant differences in protein hydrophobicity, even though the modifications caused only 1% increase in protein molecular weight and 2% variation in isoelectric points. HIC and ATPS results correlated well (R-2 =... (More)
The hydrophobic contributions of 17 individual peptides, fused to the N-terminal of Bacillus stearothermophilus lactate dehydrogenase (LDH) were studied by hydrophobic interaction chromatography (HIC) and aqueous two-phase system (ATPS). The constructs were sequenced from a protein library designed with a five-amino acid randomised region in the N-terminal of an LDH protein. The 17 LDH variants and an LDH control lacking the randomised region were expressed in Escherichia coli. HIC and ATPS behaviour of the proteins indicated significant differences in protein hydrophobicity, even though the modifications caused only 1% increase in protein molecular weight and 2% variation in isoelectric points. HIC and ATPS results correlated well (R-2 = 0.89). Protein expression was clearly affected by N-terminal modification, but there was no evidence that the modification affected protein activity. A GluAsnAlaAspVal modification resulted in increased protein expression. In most cases, HIC and ATPS results compared favourably with those predicted on the basis of 34 amino acid residue hydrophobicity scales; assuming exposure of tag residues to solution. Exceptions included LeuAlaGlyValIle and LeuTyrGlyCysIle modifications, which were predicted, assuming full solution exposure, to be more hydrophobic than observed. (C) 2004 Elsevier B.V. All rights reserved. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Fusion proteins, Escherichia coli, Partitioning, Hydrophobicity, Aqueous two-phase systems, Peptides, Lactate dehydrogenase
in
Journal of Chromatography. B
volume
807
issue
1
pages
25 - 31
publisher
Elsevier
external identifiers
  • wos:000222047600005
  • pmid:15177156
  • scopus:2642530983
ISSN
1873-376X
DOI
10.1016/j.jchromb.2004.01.049
language
English
LU publication?
yes
id
265c40ed-0c53-46da-8b08-f68b3296df40 (old id 141012)
date added to LUP
2007-07-16 09:14:27
date last changed
2017-01-01 04:58:47
@article{265c40ed-0c53-46da-8b08-f68b3296df40,
  abstract     = {The hydrophobic contributions of 17 individual peptides, fused to the N-terminal of Bacillus stearothermophilus lactate dehydrogenase (LDH) were studied by hydrophobic interaction chromatography (HIC) and aqueous two-phase system (ATPS). The constructs were sequenced from a protein library designed with a five-amino acid randomised region in the N-terminal of an LDH protein. The 17 LDH variants and an LDH control lacking the randomised region were expressed in Escherichia coli. HIC and ATPS behaviour of the proteins indicated significant differences in protein hydrophobicity, even though the modifications caused only 1% increase in protein molecular weight and 2% variation in isoelectric points. HIC and ATPS results correlated well (R-2 = 0.89). Protein expression was clearly affected by N-terminal modification, but there was no evidence that the modification affected protein activity. A GluAsnAlaAspVal modification resulted in increased protein expression. In most cases, HIC and ATPS results compared favourably with those predicted on the basis of 34 amino acid residue hydrophobicity scales; assuming exposure of tag residues to solution. Exceptions included LeuAlaGlyValIle and LeuTyrGlyCysIle modifications, which were predicted, assuming full solution exposure, to be more hydrophobic than observed. (C) 2004 Elsevier B.V. All rights reserved.},
  author       = {Fexby, Sara and Ihre, H and Van Alstine, J and Bülow, Leif},
  issn         = {1873-376X},
  keyword      = {Fusion proteins,Escherichia coli,Partitioning,Hydrophobicity,Aqueous two-phase systems,Peptides,Lactate dehydrogenase},
  language     = {eng},
  number       = {1},
  pages        = {25--31},
  publisher    = {Elsevier},
  series       = {Journal of Chromatography. B},
  title        = {N-Terminal tagged lactate dehydrogenase proteins: evaluation of relative hydrophobicity by hydrophobic interaction chromatography and aqueous two-phase system partition},
  url          = {http://dx.doi.org/10.1016/j.jchromb.2004.01.049},
  volume       = {807},
  year         = {2004},
}