InterPro domain: IPR044961

This entry represents a group of plant tetratricopeptide repeat proteins, including POLLENLESS 3 (also known as MS5) and SULFUR DEFICIENCY-INDUCED 1 (SDI1). MS5 is involved in the regulation of cell division after male meiosis I and II to facilitate exit from meiosis and transition to G1. MS5 mutants are male sterile, pollen tetrads undergo an extra round of division after meiosis II without chromosome replication, resulting in chromosome abnormalities [ 1 , [ 2 ]. SDI1 is involved in the utilization of stored sulphate pools under sulphur-limiting conditions [ 3 ].

1. Cytological characterization of four meiotic mutants of Arabidopsis isolated from T-DNA-transformed lines. Chromosome Res 5, 551-9
2. Meiotic progression in Arabidopsis is governed by complex regulatory interactions between SMG7, TDM1, and the meiosis I-specific cyclin TAM. Plant Cell 22, 3791-803
3. A sulphur deficiency-induced gene, sdi1, involved in the utilization of stored sulphate pools under sulphur-limiting conditions has potential as a diagnostic indicator of sulphur nutritional status. Plant Biotechnol J 7, 200-9