Amino acid replacement: W45R.
T13389740A
W45R | Poc1-PA; W45R | Poc1-PB
W45R
T to A or C mutation at the first base of the Trp (TGG) codon leads to an Arg.
Homozygous Poc1W45R adults display morphological sperm defects but their locomotor behavior appears unaffected (suggesting sensory cilia function is not perturbed).
Embryos fathered by Poc1W45R mutant males during their first mitosis show monopolar spindles that lack the microtubule aster (although astral microtubules do form eventually in some embryos) but have two centrioles at this pole. These embryos display a dramatic developmental delay, developmental arrest at the cleavage stage and the blastoderm stage and their hatching rate is reduced by about 50%.