Linked Life Data

12767822

Source:http://linkedlifedata.com/resource/pubmed/id/12767822

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
2003-5-27
pubmed:abstractText
The Fv is the smallest antigen binding fragment of the antibody and is made of the variable domains of the light and heavy chains, V(L) and V(H), respectively. The 26-kDa Fv is amenable for structure determination in solution using multi-dimensional hetero-nuclear NMR spectroscopy. The human monoclonal antibody 447-52D neutralizes a broad spectrum of HIV-1 isolates. This anti-HIV-1 antibody elicited in an infected patient is directed against the third variable loop (V3) of the envelope glycoprotein (gp120) of the virus. The V3 loop is an immunodominant neutralizing epitope of HIV-1. To obtain the 447-52D Fv for NMR studies, an Escherichia coli bicistronic expression vector for the heterodimeric 447-52D Fv and vectors for single chain Fv and individually expressed V(H) and V(L) were constructed. A pelB signal peptide was linked to the antibody genes to enable secretion of the expressed polypeptides into the periplasm. For easy cloning of any antibody gene without potential modification of the antibody sequence, restriction sites were introduced in the pelB sequence and following the termination codon. A set of oligonucleotides that prime the leader peptide genes of all potential antibody human antibodies were designed as backward primers. The forward primers for the V(L) and V(H) were based on constant region sequences. The 447-52D Fv could not be expressed either by a bicistronic vector or as single chain Fv, probably due to its toxicity to Escherichia coli. High level of expression was obtained by individual expression of the V(H) and the V(L) chains, which were then purified and recombined to generate a soluble and active 447-52D Fv fragment. The V(L) of mAb 447-52D was uniformly labeled with 13C and 15N nuclei (U-13C/15N). Preliminary NMR spectra demonstrate that structure determination of the recombinant 447-52D Fv and its complex with V3 peptides is feasible.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jun
pubmed:issn
1046-5928
pubmed:author
pubmed:issnType
Print
pubmed:volume
29
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
291-303
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed-meshheading:12767822-Amino Acid Sequence, pubmed-meshheading:12767822-Antibodies, Monoclonal, pubmed-meshheading:12767822-Base Sequence, pubmed-meshheading:12767822-Carbon Isotopes, pubmed-meshheading:12767822-Escherichia coli, pubmed-meshheading:12767822-Genetic Vectors, pubmed-meshheading:12767822-HIV Antibodies, pubmed-meshheading:12767822-HIV-1, pubmed-meshheading:12767822-Humans, pubmed-meshheading:12767822-Immunoglobulin Fragments, pubmed-meshheading:12767822-Immunoglobulin Variable Region, pubmed-meshheading:12767822-Isotope Labeling, pubmed-meshheading:12767822-Molecular Sequence Data, pubmed-meshheading:12767822-Molecular Weight, pubmed-meshheading:12767822-Nitrogen Isotopes, pubmed-meshheading:12767822-Nuclear Magnetic Resonance, Biomolecular, pubmed-meshheading:12767822-Protein Conformation, pubmed-meshheading:12767822-Recombinant Proteins
pubmed:year
2003
pubmed:articleTitle
Expression, purification, and isotope labeling of the Fv of the human HIV-1 neutralizing antibody 447-52D for NMR studies.
pubmed:affiliation
Department of Structural Biology, The Weizmann Institute of Science, Rehovot 76100, Israel.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, Non-U.S. Gov't