Protein-protein interactions (PPI) play a crucial role in basic processing of living cells. PPI data can provide deep insights to reveal molecular machinery for our better understanding of the mechanism of diseases . STRING 11.5 server was used to search for the possible functional fellows of the hypothetical protein in the PPI network. The identified functional partners with scores were-lapA (0.973), cutC (0.634), pgpB (0.616), asmB (0.573), rlpB (0.548), hemX (0.546), lpxH (0.536), ftsH (0.527), YPO3362 (0.520), yfiO (0.515). Of them, YPO3362 is essential cell division protein, yfiO is a part of the outer membrane protein assembly complex, ftsH is a processive protein in the quality control of integral membrane proteins, lpxH is lipid A biosynthesizer, hemX is a methyltransferase, rlpB is a lipopolysaccharide assembler, asmB is involved in lipid A biosynthesis, pgpB is phosphatidyglycerophosphatase B like protein, cutC is involved in the control of copper homeostasis and lapA is involved in the assembly of lipopolysaccharide (Fig. ) Fig. . String network protein-protein interaction analysis showing the functional partners of lapB.