<p> Members of this family are the PhnL protein of C-P lyase systems for utilization of phosphonates. These systems resemble phosphonatase-based systems in having a three-component ABC transporter, where <db_xref db="INTERPRO" dbkey="IPR005769"/> is the permease, <db_xref db="INTERPRO" dbkey="IPR005770"/> is the phosphonates binding protein, and <db_xref db="INTERPRO" dbkey="IPR012693"/> is the ATP-binding cassette (ABC) protein. They differ, however, in having, typically, ten or more additional genes, many of which are believed to form a membrane-associated C-P lyase complex. This protein (PhnL) and the adjacent-encoded PhnK (<db_xref db="INTERPRO" dbkey="IPR012700"/>) resemble transporter ATP-binding proteins but are suggested, based on mutagenesis studies, to be part of this C-P lyase complex rather than part of a transporter per se [<cite idref="PUB00016017"/>].</p> Phosphonate C-P lyase system, PhnL