An interaction between two organisms living together in more or less intimate association. The term host is used for the larger (macro) of the two members of a symbiosis; the various forms of symbiosis include parasitism, commensalism and mutualism.

The directed movement of DNA from an organism to a location inside its host organism. The host is defined as the larger of the organisms involved in a symbiotic interaction.

Any process evolved to enable an interaction with an organism of a different species.

The chemical reactions and pathways resulting in the breakdown of glutamine into other compounds, including fumarate.

The chemical reactions and pathways resulting in the breakdown of glutamine, 2-amino-4-carbamoylbutanoic acid.

The chemical reactions and pathways resulting in the breakdown of L-cysteine into other compounds, including pyruvate.

The chemical reactions and pathways resulting in the breakdown into pyruvate of L-cystine, catalyzed by the enzyme cysteine dioxygenase (EC:1.13.11.20).

The chemical reactions and pathways resulting in the breakdown of L-cysteine into other compounds, including taurine.

The chemical reactions and pathways resulting in the breakdown of L-cysteine, via the intermediate cystine.

The chemical reactions and pathways resulting in the breakdown, via the compound cystine, of L-cysteine, catalyzed by the enzyme glutathione-cystine transhydrogenase.

OBSOLETE. Penetration by a symbiont into a host organism via naturally occurring openings in the host organism. The host is defined as the larger of the organisms involved in a symbiotic interaction.

The chemical reactions and pathways resulting in the breakdown, via the compound cystine, of L-cysteine, catalyzed by the enzyme cystine reductase.

The chemical reactions and pathways resulting in the breakdown, via the compound cystine, of L-cysteine, catalyzed by the enzyme cysteine transaminase.

OBSOLETE. The increase in size or mass of an organism, or the progression of an organism from an initial condition to a later condition, occurring within the cells or tissues of the host organism. This may (but not necessarily) include a filamentous growth form, and also can include secretion of proteases and lipases to break down host tissue. The host is defined as the larger of the organisms involved in a symbiotic interaction.

The chemical reactions and pathways resulting in the breakdown of methionine into other compounds, including succinyl-CoA.

The chemical reactions and pathways involving succinyl-CoA, a compound composed of the monovalent acyl group 3-carboxypropanoyl, derived from succinic acid by loss of one OH group, linked to coenzyme A.

The chemical reactions and pathways resulting in the breakdown of methionine (2-amino-4-(methylthio)butanoic acid), a sulfur-containing, essential amino acid found in peptide linkage in proteins.

The chemical reactions and pathways resulting in the breakdown of methionine, via the intermediate 2-oxobutanoate.