Question

what is difference bewteen lipoprotein and LPS? Does negative gram bacteria lacks of lipoprotein?

Answer 1

A lipoprotein is a biochemical assembly whose primary purpose is to transport hydrophobic lipid (also known as fat) molecules in water, as in blood plasma or other extracellular fluids Lipopolysaccharides (LPS), also known as lipoglycans and endotoxins, are large molecules consisting of a lipid and a polysaccharide composed of O-antigen, outer core and inner core joined by a covalent bond; they are found in the outer membrane of Gram-negative bacteria.

The role of lipoprotein particles is to transport all fat molecules, such as triacylglycerols (also known as triglycerides), phospholipids, and cholesterol within the extracellular water of the body to all the cells and tissues of the body. lipoprotein contains a binding site for the LPS . thus they act a way to transport the LPS.

STRUCTURAL DIFFERENCES- STRUCTURE OF LIPOPROTEINS. Lipoproteins are complex particles that have a central hydrophobic core of non-polar lipids, primarily cholesterol esters and triglycerides. This hydrophobic core is surrounded by a hydrophilic membrane consisting of phospholipids, free cholesterol, and apolipoproteins

LPS consists of three components or regions: Lipid A, an R polysaccharide and an O polysaccharide. Region I. Lipid A is the lipid component of LPS. It contains the hydrophobic, membrane-anchoring region of LPS

YES, LIPOPROTEINS ARE PRESENT IN GRAM NEGATIVE BACTERIA.

Localization of bacterial lipoproteins. (A) In Gram-negative bacteria, lipoproteins are attached to the cytoplasmic membrane, the extracellular or peripheral side of the outer membrane. ... In Gram-negative bacteria, mature lipoproteins are localized to various sites within the cell wall