Leishmania_braziliensis_gp63_functional_domain_sequence 20.fas

DNA sequence of the gp63 fragment encoding the functional domain of leishmanolysin in natural isolates of Leishmania braziliensis from Corte de Pedra, Northeast Brazil: allele 20. The stretch of gp 63 previously described as encoding the functional domain of the molecule was amplified by PCR, cloned into pcr 2.1 vector and bidirectionally sequenced. Sequences from a panel of 41 parasite isolates were aligned and 45 alleles of the fragment could be identified based on indel and SNPs presented among cloned domains. Haplotypes of polymorphisms (indel and SNPs) that could be detected in at least two clones of the gp63 domain in a single isolate, and in at least two parasite isolates in the collection were considered alleles. Corte de Pedra is a region highly endemic for American tegumentary leishmaniasis (ATL) due to L. braziliensis. Several forms of ATL occur and close to 1,500 new cases are diagnosed in the region each year.

巴西东北部科尔特德佩德拉（Corte de Pedra）地区巴西利什曼原虫（Leishmania braziliensis）自然分离株中编码利什曼溶素（leishmanolysin）功能结构域的gp63片段DNA序列：等位基因20。此前被报道可编码该分子功能结构域的gp63区段经聚合酶链式反应（PCR）扩增后，被克隆至pcr2.1载体并完成双向测序。对纳入研究的41株寄生虫分离株的序列进行比对后，基于克隆结构域间存在的插入缺失（indel）与单核苷酸多态性（SNPs），共鉴定出该片段的45个等位基因。将在单个分离株的gp63结构域的至少两个克隆中可检测到，且在本研究收集的至少两株寄生虫分离株中可检测到的多态性（插入缺失与单核苷酸多态性）单倍型定义为等位基因。科尔特德佩德拉是巴西利什曼原虫所致美国皮肤利什曼病（American tegumentary leishmaniasis, ATL）的高流行区，该地区存在多种类型的美国皮肤利什曼病，每年新确诊病例近1500例。