sma-6 (Q09488) review notes

• Deep research: the first run (falcon, 600 s timeout, perplexity-lite fallback unavailable) failed. A rerun with --timeout 1500 produced sma-6-deep-research-falcon.md.
• Identity: the type I BMP receptor kinase of the DBL-1 Sma/Mab pathway PMID:9847239.
• Tissue: hypodermis is the key site PMID:11784045.
• Localization and trafficking: basolateral plasma membrane; recycling through retromer PMID:24550286.
• Not dauer-constitutive PMID:9847239. The dauer IGI rows are therefore kept as non-core crosstalk.
• IBA activin terms (PTN000583887) changed to their BMP equivalents. C. elegans has no activin, and the SMA-6 ligand is the BMP-like DBL-1.
• IEA nucleus removed: it was derived from the SMA-3 nuclear-retention phenotype, not from SMA-6 itself.
• Core MF: GO:0098821 BMP receptor activity (child of GO:0004675, which the module uses).