Identification of bacteria K. pneumoniae
The form of K pneumoniae(Gram negetive bacterium) is rod and the average size of a length of 2 µm x0.5 µm wide Gram staining of K pneumoniae ITB1 shows in Fig. 3 shows the similarity to K. pneumoniae as a Gram negative and rod shape bacteria.
The further identification of bacteria is conducted by PCR 16S rRNA using universal primer 5’- AGAGTTTGATC(A/C)TGGCTCAG-3' (BactF1) and 5'-GGTTAC(GIC)TTTGTTACGACTT-3' (UniB 1). The PCR amplification result was sequence by dye terminator dideoxy Sanger method. And the 16S rRNA sequence was align with data in Gene Bank NCBI. It shows highest similaity to many strain of the K. pneumoniae(data not shown)
Isolation haloacid dehalogenase gene by PCR
The isolation of haloacid dehalogenase gene hakp1 is conducted by PCR mothod using forward primer 5’-ATGATCCGCGCCATCGTG-3’ (Tm=58.4 °C ) and reverse pimer 5'-TCATGC TGGGATC TGCTCC-3’ (Tm 57.1 °C) It ensure that all pre-heating for denaturation of chromosome(template ) for 4 minutes at temperature of 94 °C. This is done to by all chromosomes have become single stranded DNA. The PCR cycle denaturation temperatu of 94 °C followed by annealing temperature of 50 oc and elongation temperature of 72 °C. Cycles performed 34 times.
PCR amplification result of haloacid dehalogenase gene(hakp1) shown in the form of single band in agarose gel and the size of that DNA fragment hakpl1 is 690 base pairs (Fig.4) this DNA fragment size of in silico analysis of haloacid dehalogenase gene of K. pneumoniae with data Gene Bank using primer Blast program.
Recombinant plasmid transformation
Recombinant plasmid pGEM-HAD, transformed into competent cells of E.coli TOP10 using heat shock method Culture of transformation results further were grown in selective medium containing ampicillin,X-gel and IPTG. Bacterial cells were successfully transformed with a plasmid will be able to survive in a medium containing ampicillin, Colonies containing recombinant plasmid are white colonies, while the blue colonies are containing plasmid pGEM-T(Fig. 5)