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Prediction of solubility on recombinant expression of Plasmodium falciparum erythrocyte membrane protein I domains in Escherichia coli

Ahuja, Sanjay; Ahuja, Sat pal LU ; Chen, Qijun and Wahlgren, Mats (2006) In Malaria Journal 5.
Abstract
Background: Cellular interactions elicited by Plasmodium falciparum erythrocyte membrane protein antigen 1 (PfEMP1) are brought about by multiple DBL ( Duffy binding like), CIDR ( cysteine-rich interdomain region) and C2 domain types. Elucidation of the functional and structural characteristics of these domains is contingent on the abundant availability of recombinant protein in a soluble form. A priori prediction of PfEMP1 domains of the 3D7 genome strain, most likely to be expressed in the soluble form in Escherichia coli was computed and proven experimentally. Methods: A computational analysis correlating sequence-dependent features to likelihood for expression in soluble form was computed and predictions were validated by the colony... (More)
Background: Cellular interactions elicited by Plasmodium falciparum erythrocyte membrane protein antigen 1 (PfEMP1) are brought about by multiple DBL ( Duffy binding like), CIDR ( cysteine-rich interdomain region) and C2 domain types. Elucidation of the functional and structural characteristics of these domains is contingent on the abundant availability of recombinant protein in a soluble form. A priori prediction of PfEMP1 domains of the 3D7 genome strain, most likely to be expressed in the soluble form in Escherichia coli was computed and proven experimentally. Methods: A computational analysis correlating sequence-dependent features to likelihood for expression in soluble form was computed and predictions were validated by the colony filtration blot method for rapid identification of soluble protein expression in E. coli. Results: Solubility predictions for all constituent PfEMP1 domains in the decreasing order of their probability to be expressed in a soluble form (% mean solubility) are as follows: ATS (56.7%) > CIDR1 alpha (46.8%) > CIDR2 beta (42.9%) > DBL2-4 gamma (31.7%) > DBL2 beta + C2 (30.6%) > DBL1 alpha (24.9%) > DBL2-7 epsilon (23.1%) > DBL2-5 delta (14.8%). The length of the domains does not correlate to their probability for successful expression in the soluble form. Immunoblot analysis probing for soluble protein confirmed the differential in solubility predictions. Conclusion: The acidic terminal segment ( ATS) and CIDR alpha/beta domain types are suitable for recombinant expression in E. coli while all DBL subtypes (alpha, beta, gamma, delta, epsilon) are a poor choice for obtaining soluble protein on recombinant expression in E. coli. This study has relevance for researchers pursuing functional and structural studies on PfEMP1 domains. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Malaria Journal
volume
5
publisher
BioMed Central
external identifiers
  • pmid:16796764
  • wos:000239460700001
  • scopus:33746525978
ISSN
1475-2875
DOI
10.1186/1475-2875-5-52
language
English
LU publication?
yes
id
6f924af9-6a7f-40b5-90cf-008d9cba76c2 (old id 399425)
date added to LUP
2007-08-10 15:56:34
date last changed
2019-04-30 02:33:46
@article{6f924af9-6a7f-40b5-90cf-008d9cba76c2,
  abstract     = {Background: Cellular interactions elicited by Plasmodium falciparum erythrocyte membrane protein antigen 1 (PfEMP1) are brought about by multiple DBL ( Duffy binding like), CIDR ( cysteine-rich interdomain region) and C2 domain types. Elucidation of the functional and structural characteristics of these domains is contingent on the abundant availability of recombinant protein in a soluble form. A priori prediction of PfEMP1 domains of the 3D7 genome strain, most likely to be expressed in the soluble form in Escherichia coli was computed and proven experimentally. Methods: A computational analysis correlating sequence-dependent features to likelihood for expression in soluble form was computed and predictions were validated by the colony filtration blot method for rapid identification of soluble protein expression in E. coli. Results: Solubility predictions for all constituent PfEMP1 domains in the decreasing order of their probability to be expressed in a soluble form (% mean solubility) are as follows: ATS (56.7%) > CIDR1 alpha (46.8%) > CIDR2 beta (42.9%) > DBL2-4 gamma (31.7%) > DBL2 beta + C2 (30.6%) > DBL1 alpha (24.9%) > DBL2-7 epsilon (23.1%) > DBL2-5 delta (14.8%). The length of the domains does not correlate to their probability for successful expression in the soluble form. Immunoblot analysis probing for soluble protein confirmed the differential in solubility predictions. Conclusion: The acidic terminal segment ( ATS) and CIDR alpha/beta domain types are suitable for recombinant expression in E. coli while all DBL subtypes (alpha, beta, gamma, delta, epsilon) are a poor choice for obtaining soluble protein on recombinant expression in E. coli. This study has relevance for researchers pursuing functional and structural studies on PfEMP1 domains.},
  author       = {Ahuja, Sanjay and Ahuja, Sat pal and Chen, Qijun and Wahlgren, Mats},
  issn         = {1475-2875},
  language     = {eng},
  publisher    = {BioMed Central},
  series       = {Malaria Journal},
  title        = {Prediction of solubility on recombinant expression of Plasmodium falciparum erythrocyte membrane protein I domains in Escherichia coli},
  url          = {http://dx.doi.org/10.1186/1475-2875-5-52},
  volume       = {5},
  year         = {2006},
}