Loss of ASP but not ROPN1 reduces mammalian ciliary motility

Sarah E. Fiedler, Joseph H. Sisson, Todd A. Wyatt, Jacqueline A. Pavlik, Todd M. Gambling, Johnny L. Carson, Daniel W. Carr

Research output: Contribution to journalArticlepeer-review

19 Scopus citations


Protein kinase A (PKA) signaling is targeted by interactions with A-kinase anchoring proteins (AKAPs) via a dimerization/docking domain on the regulatory (R) subunit of PKA. Four other mammalian proteins [AKAP-associated sperm protein (ASP), ropporin (ROPN1), sperm protein 17 (SP17) and calcium binding tyrosine-(Y)-phosphorylation regulated protein (CABYR)] share this highly conserved RII dimerization/docking (R2D2) domain. ASP and ROPN1 are 41% identical in sequence, interact with a variety of AKAPs in a manner similar to PKA, and are expressed in ciliated and flagellated human cells. To test the hypothesis that these proteins regulate motility, we developed mutant mouse lines lacking ASP or ROPN1. Both mutant lines produced normal numbers of cilia with intact ciliary ultrastructure. Lack of ROPN1 had no effect on ciliary motility. However, the beat frequency of cilia from mice lacking ASP is significantly slower than wild type, indicating that ASP signaling may regulate ciliary motility. This is the first demonstration of in vivo function for ASP. Similar localization of ASP in mice and humans indicates that these findings may translate to human physiology, and that these mice will be an excellent model for future studies related to the pathogenesis of human disease. Published 2011 Wiley Periodicals, Inc.

Original languageEnglish (US)
Pages (from-to)22-32
Number of pages11
Issue number1
StatePublished - Jan 2012


  • A-kinase anchoring protein
  • OmniBank®
  • ROPN1L
  • Ropporin

ASJC Scopus subject areas

  • Structural Biology
  • Cell Biology


Dive into the research topics of 'Loss of ASP but not ROPN1 reduces mammalian ciliary motility'. Together they form a unique fingerprint.

Cite this