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Protein of unknown function (DUF541) Members of this family have so far been found in bacteria and mouse SwissProt or TrEMBL entries. However possible family members have also been identified in translated rat (Genbank:AW144450) and human (Genbank:AI478629) ESTs. A mouse family member has been named SIMPL (signalling molecule that associates with mouse pelle-like kinase). SIMPL appears to facilitate and/or regulate complex formation between IRAK/mPLK (IL-1 receptor-associated kinase) and IKK (inhibitor of kappa-B kinase) containing complexes, and thus regulate NF-kappa-B activity. Separate experiments demonstrate that a mouse family member (named LaXp180) binds the Listeria monocytogenes surface protein ActA, which is a virulence factor that induces actin polymerization. It may also bind stathmin, a protein involved in signal transduction and in the regulation of microtubule dynamics. In bacteria its function is unknown, but it is thought to be located in the periplasm or outer membrane. |
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Jiyao W et al.(2023). "The conserved domain database in 2023.",