## SRP9
- **UniProt:** P49458 · **batch:** proteostasis-batch-2026-06-11 · **review status:** COMPLETE
- **PN placement:** `ER proteostasis|Protein transport|Signal recognition particle component` ; **PN-node mapping:** group=mapped scope=ok_for_propagation_to_go→GO:0006614 (SRP-dependent cotranslational protein targeting to membrane); class `Protein transport`=mapped→GO:0015031; branch=no_mapping.
- **Consistency:** Strong and mutually consistent. Deep research, review YAML, and PN annotation all describe SRP9 as the 9 kDa SRP subunit that, with SRP14, forms the Alu/elongation-arrest domain bound to 7SL RNA. The PN "SRP component" label and GO:0006614 mapping match the review's core BP (GO:0006614 IBA/IEA, ACCEPT). No contradictions.
- **PN story / NEW pressure:** PN asserts only the canonical SRP cotranslational-targeting role, already captured (GO:0006614 ACCEPT; plus the SRP9-specific GO:0045900 negative regulation of translational elongation and GO:0008312 7S RNA binding). Noncanonical Alu-RNA/nuclear roles (PMID:37156570, 37309897, 26585389) are in the review references but outside the PN story and not core. Conclusion: **already captured** (no NEW pressure).
- **Mapping strategy:** No change needed. GO:0006614 (goa_status already_in_goa_exact) is present and ACCEPTed — exact projection, not broader than the review. The class-level GO:0015031 is a deliberately broad class target, not asserted of SRP9 specifically. Note the review flags GO:0005785 (SRP receptor complex, TAS PMID:7730321) as over-annotated (SRP vs SRP-receptor confusion) — internal review QC unrelated to the PN node.
- **Evidence alignment:** PN dossier lists no reference titles; alignment via projected-term provenance. Review's core support (PMID:34208095 SRP review, elongation arrest; PMID:26585389 Alu-RNP ribosome-stalling structure; file UniProt) all encode the SRP cotranslational-targeting biology the PN maps to. No divergence.
- **Verdict:** Fully consistent; PN already captured, review more granular (adds elongation-arrest GO:0045900 and 7S RNA binding). No edits warranted.