1 / 1

Features of Gram-Positive and Gram-Negative Bacteria: Membrane Structures and Functions

This detailed overview explores essential characteristics of Gram-positive and Gram-negative bacteria, focusing on membrane proteins such as Braun lipoproteins and their roles in maintaining the cell structure. It addresses the importance of the endospore in resisting extreme environmental conditions, the structure of pili for conjugation and immuno-avoidance, and the composition of capsules for defense. Additionally, it examines the cytoplasmic membrane functionality, nutrient acquisition, and waste exclusion. Insights on ribosomes, nucleoid structure, and plasmids highlight bacterial genetic adaptability and antibiotic resistance.

kuri
Download Presentation

Features of Gram-Positive and Gram-Negative Bacteria: Membrane Structures and Functions

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Membrane Proteins Outer Membrane Braun Lipoprotein: Lipophilic and hydrophilic Endospore: Gram + only. Resists UV light, heat, cold, wet, dry. SPO regulon Myristic Acid O Ag Lipid A Flagella: Filament, hook (H Ag), and 4 rings (LPSM); ATP  ADP = rings turn Core Poly-saccharide Pili: Conjugation (adhesins) or Immuno-avoidance (Evasins) Endotoxins Capsule: K Ag; used for defense and nutrient storage H Ag H Ag Cytoplasmic membrane: Chemiosmotic gradient, Nutrient acq/ waste exclusion, polymer synthesis L P S M K Ag Inclusions/ granules: Food reserves, esp glycogen, lipids, polyphosphates Ribosomes K Ag Nucleoid with double-stranded, circular, super-helical chromosomes Plasmid/ Cosmid: VFs, Ab-resistance genes, Conjugation apparatus (Hfr) GRAM NEG GRAM POS

More Related