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产品名称:P1366/pNZ8148乳酸菌分泌质粒
启动子: PnisA
复制子: repA,repC
终止子: T
质粒分类: 乳酸乳球菌表达质粒
质粒大小: 3167bp
原核抗性: 氯霉素Chl
筛选标记: 氯霉素Chl
克隆菌株: NZ9000乳酸乳球菌
培养条件: M17+0.5%葡萄糖/30度密封静置液体培养
表达宿主: NZ9000乳酸乳球菌
培养条件: M17+0.5%葡萄糖/30度密封静置液体培养
5'测序引物: 根据序列设计
特点:是染色质外的双链共价闭合环形DNA(covalently closed circular DNA,cccDNA),可自然形成超螺旋结构,不同质粒大小在2-300kb之间,<15kb的小质粒比较容易分离纯化,>15kb的大质粒则不易提取。
简介: The pNZ8148 vector contains an origin of replication (ORI), the gene for the resistance to chloramphenicol, two genes for the replication proteins repA and repC, the nisin-inducible promoter (P nisA), and the transcription terminator (T). The gene, tagged with a Strep-tag II (STREP) followed by a stop codon (*), can be inserted between the necessary NcoI site and another endonuclease site from the multicloning site (MCS) such as PstI, SphI, KpnI, SpeI, XbaI, SacI and HindIII. The replicons of the vectors pNZ8008, pNZ8148, pNZ8149 and pNZ8150 are identical and came originally from the Lactococcus lactis plasmid pSH71. However, this replicon has a broad host range. Plasmids with this replicon can replicate in many Gram-positive bacteria, such as Lactobacillus plantarum and Streptococcus thermophilus. pNZ8148 – In this vector the nisA promoter is followed by an NcoI site for translational fusions at the ATG. It contains a terminator after the MCS. Sequence adaptation for cloning in NcoI can result in a change in the second amino acid of a protein (Mierau and Kleerebezem, 2005).
P1366/pNZ8148乳酸菌分泌质粒 质粒分类:
1.根据质粒能否通过细菌的接合作用,可分为接合性质粒和非接合性质粒。接合性质粒带有与接合传递有关的基因。非接合质粒在一定条件下通过与其共存的接合质粒的诱动或转导而传递。
2.根据质粒的不相容性,可分为不相容性和相容性。不相容性指结构相似、密切相关的质粒不能稳定地共存于同一宿主细菌内的现象,反之为相容性。常用于流行病学的调查。
3.根据质粒在细菌内的复制类型可分为两类:严紧控制型和松弛控制型。严紧控制复制型质粒的复制酶系与染色体DNA复制共用,只能在细胞周期的一定阶段进行复制,当细胞染色体停止复制时,质粒也就不再复制。松弛控制复制型的质粒的复制酶系不受染色体DNA复制酶系的影响,在整个细胞生长周期中随时都可以复制,在染色体复制已经停止时质粒仍能继续复制。
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