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Oligo‐astheno‐teratozoospermia (OAT), a condition that includes low sperm number, low sperm motility and abnormal sperm morphology, is the commonest cause of male infertility. Because genetic analysis is frequently impeded by the infertility phenotype, the genetic basis of many of OAT conditions has been hard to verify. Here, we show that deficiency of ORP4, a sterol‐binding protein in the oxysterol‐binding...
Phosphatidylserine (PS), a relatively minor constituent in the plasma membrane (PM), participates in various cellular processes such as clearance of apoptotic cells and recruitment of signaling molecules. PS also localizes in the membranes of endocytic organelles, such as recycling endosomes (REs). We recently showed that in REs, PS binds to the pleckstrin homology (PH) domain of evectin‐2, thereby...