What does indole mean in chemistry?
Indole is an aromatic heterocyclic organic compound with formula C8H7N. It has a bicyclic structure, consisting of a six-membered benzene ring fused to a five-membered pyrrole ring. Indole is widely distributed in the natural environment and can be produced by a variety of bacteria.
What is the chemical name of indole?
| IUPAC Name | 1H-indole |
|---|---|
| Alternative Names | indole 2,3-Benzopyrrole |
| Molecular Formula | C8H7N |
| Molar Mass | 117.151 g/mol |
| InChI | InChI=1S/C8H7N/c1-2-4-8-7(3-1)5-6-9-8/h1-6,9H |
What is indole in microbiology?
Indole is an intercellular signal in both gram-positive and gram-negative bacteria and has been shown to control a number of bacterial processes such as spore formation, plasmid stability, drug resistance, biofilm formation, and virulence (Lee & Lee, 2010).
What organisms are indole positive?
Indole-Positive Bacteria Bacteria that test positive for cleaving indole from tryptophan include: Aeromonas hydrophila, Aeromonas punctata, Bacillus alvei, Edwardsiella sp., Escherichia coli, Flavobacterium sp., Haemophilus influenzae, Klebsiella oxytoca, Proteus sp.
What is indole quizlet?
They must break it into three parts (Pyruvic Acid, Indole, NH₃) using the Enzyme Tryptophanase. What is Indole? It is a waste product that is made when Tryptophanase breaks Tryptophan down.
Where is indole found?
indole, also called Benzopyrrole, a heterocyclic organic compound occurring in some flower oils, such as jasmine and orange blossom, in coal tar, and in fecal matter.
What does a positive indole result mean?
The presence of indole when a microbe is grown in a medium rich in tryptophan demonstrates that an organism has the capacity to degrade tryptophan.
What organisms are indole-positive?
What is the positive result for the indole test?
A positive result is shown by the presence of a red or red-violet color in the surface alcohol layer of the broth. A negative result appears yellow. A variable result can also occur, showing an orange color as a result.
Is indole toxic?
Indole, a derivative of the amino acid tryptophan, is a toxic signaling molecule, which can inhibit bacterial growth. To overcome indole-induced toxicity, many bacteria have developed enzymatic defense systems to convert indole to non-toxic, water-insoluble indigo.
What does indole test determine?
The indole test screens for the ability of an organism to degrade the amino acid tryptophan and produce indole. It is used as part of the IMViC procedures, a battery of tests designed to distinguish among members of the family Enterobacteriaceae.
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