■ 基本信息

■ 質粒屬性

■ 質粒簡介

pEGFP-C1編碼野生型GFP的紅移型變體，其已經針對更明亮的熒光和哺乳動物細胞中更高的表達進行了優化。（激發最大= 488nm;發射最大值= 507nm）pEGFP-C1編碼GFPmut1變體，其含有Phe-64對Leu和Ser-65至Thr的雙氨基酸取代pEGFPC1中的MCS在EGFP編碼序列和SV40 polyA之間克隆到MCS中的基因如果與EGFP的閱讀框處于相同的閱讀框并且不存在中間終止密碼子，則將其表達為EGFP的C末端的融合物。 EGFP基因下游的SV40聚腺苷酸信號直接適當處理EGFP mRNA的3'末端。載體骨架還含有用于在表達SV40 T抗原的哺乳動物細胞中復制的SV40來源。由SV40早期啟動子，Tn5的新霉素/卡那霉素抗性基因和來自單純皰疹病毒胸苷激酶（HSV TK）基因的多聚腺苷酸化信號組成的新霉素抗性盒（Neor）允許使用G418選擇穩定轉染的真核細胞。該盒上游的細菌啟動子在大腸桿菌中表達卡那霉素抗性。 pEGFP-C1backbone還提供了用于在大腸桿菌中繁殖的pUC復制起點和用于單鏈DNA生產的f1來源。   質粒只保證關鍵序列正確，不保證表達效果。

pEGFP-C1encodes a red-shifted variant of wild-type GFP (1–3) which has been optimized for brighter fluorescence and higher expression in mammalian cells. (Excitation maximum = 488 nm;emission maximum = 507 nm.) pEGFP-C1 encodes the GFPmut1 variant (4) which contains the double-amino-acid substitution of Phe-64 to Leu and Ser-65 to Thr. The coding sequence of the EGFP gene contains more than 190 silent base changes which correspond to human codon-usage preferences (5). Sequences flanking EGFP have been converted to a Kozak consensus translation initiation site (6) to further increase the translation efficiency in eukaryotic cells. The MCS in pEGFPC1is between the EGFP coding sequences and the SV40 poly A. Genes cloned into the MCS will be expressed as fusions to the C-terminus of EGFP if they are in the same reading frame as EGFP and there are no intervening stop codons. SV40 polyadenylation signals downstream of the EGFP gene direct proper processing of the 3' end of the EGFP mRNA. The vector backbone also contains an SV40 origin for replication in mammalian cells expressing the SV40 T-antigen. A neomycin resistance cassette (Neor), consisting of the SV40 early promoter, the neomycin/kanamycin resistance gene of Tn5, and polyadenylation signals from the Herpes simplex virus thymidine kinase(HSV TK) gene, allows stably transfected eukaryotic cells to be selected using G418. A bacterial promoter upstream of this cassette expresses kanamycin resistance in E.coli. The pEGFP-C1backbone also provides a pUC origin of replication for propagation in E. coli and an f1 origin for single stranded DNA production.

Fusions to the C terminus of EGFP retain the fluorescent properties of the native protein allowing the localization of the fusion protein in vivo. The target gene should be cloned into pEGFP-C1 so that it is in frame with the EGFP coding sequences, with no intervening in-frame stop codons. The recombinant EGFP vector can be transfected into mammalian cells using any standard transfection method. If required, stable transformants can be selected using G418 . pEGFP-C1 can also be used simply to express EGFP in a cell line of interest (e.g., as a transfection marker).

Propagation in E. coli

? Suitable host strains: DH5α, HB101, and other general purpose strains. Single-stranded DNA production requires a host containing an F plasmid such as JM109 or XL1-Blue.

? Selectable marker: plasmid confers resistance to kanamycin (30 μg/ml) to E. coli hosts.

? E. coli replication origin: pUC

? Copy number: ≈500

? Plasmid incompatibility group: pMB1/ColE1

■ 質粒圖譜

■ 質粒序列

質粒序列請下載：ZK414pEGFP-C1哺乳熒光質粒.txt