Summary: Accept: 3',5'-cyclic-AMP phosphodiesterase activity.

Reason: The family-level catalytic assignment, and the one that explains the biology: hydrolysing cAMP lowers PKA output and permits conidiation. The cAMP-specific term is preferable to the unsigned-substrate parent.

Summary: Accept: 3',5'-cyclic-GMP phosphodiesterase activity.

Reason: Dual substrate specificity is common in this phosphodiesterase clade, but no cGMP assay for ACON-2 is cited here and cGMP signalling is poorly established in Neurospora. Kept as a phylogenetic inference rather than a demonstrated activity.

Summary: Accept: negative regulation of cAMP/PKA signal transduction.

Reason: The signed process term that matches the enzymology: degrading cAMP attenuates PKA signalling. The most informative process statement for ACON-2.

Summary: Accept: 3',5'-cyclic-nucleotide phosphodiesterase activity.

Reason: Unsigned-substrate parent of the cAMP and cGMP terms above; correct, but less specific.

Summary: Accept: signal transduction.

Reason: Very general parent. The cAMP/PKA regulation term carries the actual content.

Summary: Accept: phosphoric diester hydrolase activity.

Reason: The chemistry-level parent of phosphodiesterase activity; retained as an ancestor term, uninformative on its own.

Summary: Accept: metal ion binding.

Reason: Class I phosphodiesterase catalytic domains carry a binuclear metal centre, so metal binding here is a genuine cofactor requirement rather than a spurious keyword match.

Summary: Proposed new annotation. GOA captures ACON-2's enzymology and its cAMP/PKA signalling role but no term for its control of the conidiation process that signalling gates, which is the reason the gene was isolated.

Reason: acon-2 is an aconidiate mutant that requires an inducing signal to develop - elevated fl expression restores development of the acon-2 mutant only in nitrogen-starved cultures - and acon-2 contributes to the developmental induction of fl, placing it upstream of the master regulator. The existing GO:0141162 row records the signalling mechanism; this term records the process that mechanism serves. The signed term is used rather than the unsigned GO:0048315 because the direction is established - loss of acon-2 blocks macroconidiation and ACON-2 contributes to fl induction, so it is a positive regulator, not an executor of conidium formation. This matches how this review set treats the other upstream regulators (flbB, flbD as GO:0075307; fadA as GO:0075308), and leaves the unsigned GO:0048315 to the master executors fl, brlA and abaA. acon-3 is the deliberate exception to that rule - it also carries the unsigned term, because the one thing established about it is that it acts downstream of fl and is required for later conidiation stages, which does not separate a regulator of the process from a participant in it.