#adenylyl cyclase

Dictyostelium

Adenylyl cyclase in aggregation:

Among three adenylyl cyclases, ACA encoded by acaA is uniquely required for aggregation signaling. Transcribed from multiple developmental promoters, ACA produces both extracellular cAMP for chemotactic relay and intracellular cAMP for PKA-dependent gene expression. Null acaA cells cannot generate cAMP oscillations, remain unable to aggregate, and fail to express early genes despite starvation. Exogenous pulses can rescue development. ACB encoded by acrA acts later during culmination, while ACG encoded by acgA functions as osmosensor controlling spore dormancy. ACP is not a Dictyostelium cycla

Ref: PLOS ONE, ACA adenylyl cyclase as aggregation cyclase - acaA alternative promoters and signal relay function.

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Cell Signaling GPCR Pathways - I

Inhibition of adenylyl cyclase is mediated by

Adenylyl cyclase catalyzes the conversion of ATP to the second messenger cyclic AMP. The enzyme is stimulated by GTP-bound Gαs and inhibited by GTP-bound Gαi. The resulting changes in cAMP concentration regulate protein kinase A and cyclic-nucleotide-gated channels, linking G-protein-coupled receptors to diverse physiological responses. Careful

Ref: NCERT Biology Class 11–12 Alberts et al Molecular Biology of the Cell Lodish et al, Molecular Cell Biology Cooper & Hausman, The Cell Abbas et al., Cellular and Molecular Immunology (for immunology sections)

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Cell Signaling GPCR Pathways - I

Which Gα subunit stimulates adenylyl cyclase?

Adenylyl cyclase catalyzes the conversion of ATP to the second messenger cyclic AMP. The enzyme is stimulated by GTP-bound Gαs and inhibited by GTP-bound Gαi. The resulting changes in cAMP concentration regulate protein kinase A and cyclic-nucleotide-gated channels, linking G-protein-coupled receptors to diverse physiological responses. Careful

Ref: NCERT Biology Class 11–12 Alberts et al Molecular Biology of the Cell Lodish et al, Molecular Cell Biology Cooper & Hausman, The Cell Abbas et al., Cellular and Molecular Immunology (for immunology sections)

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Cell Signaling GPCR Pathways - I

Adenylyl cyclase converts

Adenylyl cyclase catalyzes the conversion of ATP to the second messenger cyclic AMP. The enzyme is stimulated by GTP-bound Gαs and inhibited by GTP-bound Gαi. The resulting changes in cAMP concentration regulate protein kinase A and cyclic-nucleotide-gated channels, linking G-protein-coupled receptors to diverse physiological responses. Careful

Ref: NCERT Biology Class 11–12 Alberts et al Molecular Biology of the Cell Lodish et al, Molecular Cell Biology Cooper & Hausman, The Cell Abbas et al., Cellular and Molecular Immunology (for immunology sections)

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