The BF locus and HLA: Rare alleles coding for functionally active and inactive factor-B products

Geoffrey J. O'Neill, Peggy Miniter, Christoph Nerl, Young Yang Soo Young Yang, Bo Dupont, Marilyn S. Pollack

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


The genetic polymorphism of properdin factor B(BF) was studied in different populations. The rarer alleles, BF*F1 and BF*S1, occurred in Caucasians, were less frequent in North American blacks, and were not demonstrated in any of there Oriented populations studied. Two further alleles of BF, termed BF*FM and BF*SM, were found to exist in these populations. The BF*FM allele, which was found only in Caucasian, codes for a functionally inactive factor-B product, whereas the BF*SM allele (found in a single Chinese individual), like other alleles of BF, codes for a functionally active product. HLA haplotype analyses in individuals carrying the rarer alleles of BF revealed not only a strong association between B*F1 and HLA-B18 and BF*S1 and HLA-Bw50 but an even stronger association between these BF alleles and alleles of the two C4 loci. BF*F1 occurred most frequently on a C4A*3,B*Q0 haplotype, ubreas the BF*S1 allele was usually found on a C4a*2,B*1/B*Q0 haplotype. HLA haploypes carrying the BF*FM and BF*SM alleles all carried the more common C*4A3,B*1 haplotype.

Original languageEnglish (US)
Pages (from-to)239-246
Number of pages8
JournalHuman Immunology
Issue number3
StatePublished - Nov 1982
Externally publishedYes

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology


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