Selected because this is a high-value zero-GOA case where UniProt/CARD and old biochemical literature point to a missing GO molecular function. The UniProt entry is historically named linA, while CARD labels the ARO determinant lnuA; the review uses lnuA as the project symbol and records linA as an alias [file:genes/STAHA/lnuA/lnuA-uniprot.txt]. The original linA sequence paper supports the phenotype: linA confers resistance to lincomycin by inactivating it in S. haemolyticus PMID:3091456. The follow-up biochemical paper identifies lincosaminide O-nucleotidyltransferases and reports lincomycin 3-(5'-adenylate) and clindamycin 4-(5'-adenylate) products PMID:2846528.
The AMR mapping file records ARO:3000221 as a GO gap because GO lacks a lincosamide O-nucleotidyltransferase molecular-function term [file:projects/ANTIMICROBIAL_RESISTANCE/aro2go.sssom.yaml]. The review proposes that term and uses only broad GO:0016740 transferase activity as an interim MF.