The function of IL11RA (interleukin 11 receptor subunit alpha, Ensembl gene identifier ENSG00000137070) is as follows. Receptor for interleukin-11 (IL11). The receptor systems for IL6, LIF, OSM, CNTF, IL11 and CT1 can utilize IL6ST for initiating signal transmission. The IL11/IL11RA/IL6ST complex may be involved in the control of proliferation and/or differentiation of skeletogenic progenitor or other mesenchymal cells (Probable). Essential for the normal development of craniofacial bones and teeth. Restricts suture fusion and tooth number. . [Soluble interleukin-11 receptor subunit alpha]: Soluble form of IL11 receptor (sIL11RA) that acts as an agonist of IL11 activity (PubMed:26876177, PubMed:30279168). The IL11:sIL11RA complex binds to IL6ST/gp130 on cell surfaces and induces signaling also on cells that do not express membrane-bound IL11RA in a process called IL11 trans- signaling (PubMed:26876177, PubMed:30279168). . [Isoform HCR2]: Soluble form of IL11 receptor (sIL11RA) that acts as an agonist of IL11 activity (PubMed:26876177, PubMed:30279168). The IL11:sIL11RA complex binds to IL6ST/gp130 on cell surfaces and induces signaling also on cells that do not express membrane-bound IL11RA in a process called IL11 trans-signaling (PubMed:26876177, PubMed:30279168). {ECO:0000269|PubMed:26876177, ECO:0000269|PubMed:30279168}.