The paper explicitly identifies SPD_0077 in D39. No independent membrane-transporter molecular activity is assigned. The native interaction and uptake experiments support regulator activity in core functions; no NEW process annotation is manufactured.
Falcon deep research was attempted using just deep-research-falcon STRP2 cabP and failed with HTTP 403 authentication failure. This is manual primary-source research, not a provider-generated report. The original machine annotation payloads and raw UniProt/GOA files are retained. No NEW annotation rows were added in the initial pass; the follow-up below records the final recommendation.
Module membership: MODULE:bacterial_c_di_amp_signaling, receptor arm. No unsupported top-level association slot is used.
The process actions refine direct regulator roles to regulation of potassium transport; membrane translocation remains the partner activity.
Added NEW GO:0180001 (IDA; PMID:24272783) for the directly demonstrated binding by D39 SPD_0077. Retained GO:0141108 transporter regulator activity in the core synthesis: the inspected primary evidence demonstrates interaction with SPD_0076 and modulation of uptake. The more specific potassium-channel regulator term used for S. aureus KtrA has additional target-specific channel-system characterization in PMID:23815639; no independent pore activity is assigned to either regulator.