This entry represents a group of plant meiosis-specific proteins, such as AtASY3 from Arabidopsis and PAIR3 from rice. They are coiled-coil domain proteins required for normal meiosis [1]. PAIR3 is an axial element and part of the synaptonemal complex (SC) that forms between homologous chromosomes during meiosis [2]. Members of this family are homologues of SCYP2 from vertebrates and fungal Red1/Rec10 [3].

1: Inter-homolog crossing-over and synapsis in Arabidopsis meiosis are dependent on the chromosome axis protein AtASY3. Ferdous M, Higgins JD, Osman K, Lambing C, Roitinger E, Mechtler K, Armstrong SJ, Perry R, Pradillo M, Cunado N, Franklin FC; PLoS Genet. 2012;8:e1002507. PMID:22319460

2: Bivalent Formation 1, a plant-conserved gene, encodes an OmpH/coiled-coil motif-containing protein required for meiotic recombination in rice. Zhou L, Han J, Chen Y, Wang Y, Liu YG; J Exp Bot. 2017;68:2163-2174. PMID:28369589

3: Repurposing of synaptonemal complex proteins for kinetochores in Kinetoplastida. Tromer EC, Wemyss TA, Ludzia P, Waller RF, Akiyoshi B; Open Biol. 2021;11:210049. PMID:34006126