BQP35 is a novel member of the intrinsically unstructured protein (IUP) family which is a potential antigen for the sero-diagnosis of Babesia sp. BQ1 (Lintan) infection.
Abstract A new gene of Babesia sp. BQ1 (Lintan) (BQP35) was cloned by screening a merozoite cDNA expression library with infected sheep serum and using rapid amplification of cDNA ends (RACE). The nucleotide sequence of the cDNA was 1140bp with an open reading frame (ORF) of 936bp
encoding a 35-kDa predicted polypeptide with 311 amino acid residues.
Comparison of BQP35 cDNA and genomic DNA sequences showed that BQP35 does not possess an intron. Recombinant BQP35 (rBQP35), expressed in a prokaryotic expression system, showed abnormally slow migration on SDS-PAGE.
Gel shifting, amino acid sequence and in silico disorder region prediction indicated that BQP35 protein has characteristics of intrinsically unstructured proteins (IUPs).
This is the first description of such proteins in the Babesia genus.
BQP35 induced antibodies production as early as one week after Babesia sp. BQ1 (Lintan) infection in sheep. No cross-reaction was observed with sera from sheep infected with other ovine piroplasms dominant in China, except with Babesia sp. Tianzhu. The interest of BQP35 as a diagnostic antigen is discussed.
Posted by Pinelady (Member # 18524) on :
Genetic conservation of potentially immunogenic proteins among Brazilian isolates of Babesia bovis.
Laborat�rio de Doen�as Parasit�rias dos Animais Dom�sticos, Departamento de Medicina Veterin�ria -UFRPE, Recife, PE 52171-900, Brazil; Embrapa Gado de Corte, Campo Grande, MS 79002-970, Brazil. Abstract
Bovine babesiosis caused by Babesia bovis remains an important constraint for the development of cattle industries worldwide.
Effective control can be achieved by vaccination with live attenuated phenotypes of the parasite. However, these vaccines have a number of drawbacks, which justifies the search for better, safer vaccines.
In recent years, a number of parasite proteins with immunogenic potential have been discovered. However, there is little information on the genetic conservation of these proteins among different parasite isolates, which hinders their assessment as immunogens.
The aim of the present study was to evaluate the conservation of the genes ama-1, acs-1, rap-1, trap, p0 and msa2c among five Brazilian isolates of B. bovis.
Through polymerase chain reaction, genetic sequencing and bioinformatics analysis of the genes, a high degree of conservation (98-100%) was found among Brazilian isolates of B. bovis and the T2Bo isolate.
Thus, these genes are worth considering as viable candidates to be included in a recombinant cocktail vaccine for cattle babesiosis caused by B. bovis. ------------------- Here's yur sign...
Posted by seekhelp (Member # 15067) on :
And what does this mean for us?
Posted by Pinelady (Member # 18524) on :
It means it too can hide from the tests in a prion like fashion... and----- Brazil is either making fun or really like most vaccine makers haven't got a clue to what they are doing, besides coming up with some junk to sell...