Oryza sativa (japonica cultivar-group) protein "Q75RY2" (Protein PAIR1)

Accession

Q75RY2

Species

Oryza sativa (japonica cultivar-group) [ GR_tax:013684 ]

Name

Protein PAIR1

Symbol

PAIR1

Synonyms (2)

Coiled-coil protein

OSJNBa0009C08.13

E.C. Numbers (0)

None

Gene Names (1)

PAIR1 (HOMOLOGOUS PAIRING ABERRATION IN RICE MEIOSIS 1)

Organelle

Not available

Best Hits To TIGR Rice Gene Models (0)

None [ Click here to generate a BLASTP query ]

IRGSP/RAP Genes (0)

None

Source

SWISSPROT

GenBank Accessions (1)

BAD15032

UniProt Accession (Sequence)

Q75RY2

Cultivar

Nipponbare ( GRIN , IRIS )

Comment

The gene plays an essential role in establishment of homologous chromosome pairing and cytokinesis in male and female meiocytes. The encoded protein contains putative coiled-coil motifs in the middle, two basic regions at both termini, and a potential nuclear localization signal at the C terminus. In the mutant, tagged by the endogenous retrotransposon Tos17, during prophase I all the chromosomes became entangled to form a compact sphere adhered to a nucleolus, and homologous pairing failed to occur. This resulted in complete sterility of male and female gametes. At anaphase I and telophase I, chromosome nondisjunction and degenerated spindle formation resulted in multiple uneven spore production. It is expressed in the early stages of flower development.

Term Type	Term	Reference	Evidence
Biological Process	megasporogenesis (GO:0009554)	Nonomura-K et al., 2004	IDA
			IMP
	meiotic telophase I (GO:0007134)	Nonomura-K et al., 2004	IMP
			IDA
	microsporogenesis (GO:0009556)	Nonomura-K et al., 2004	IMP
			IDA
	meiotic prophase I (GO:0007128)	Nonomura-K et al., 2004	IDA
			IMP
	meiotic anaphase I (GO:0007133)	Nonomura-K et al., 2004	IDA
			IMP
Cellular Component	nucleus (GO:0005634)	Nonomura-K et al., 2004	IMP
			IDA
	plastid (GO:0009536)	Jaiswal-P et al., 2002	IEA
Plant Structure	megasporocyte (PO:0000431)	Nonomura-K et al., 2004	IMP
			IDA
	microsporocyte (PO:0020047)	Nonomura-K et al., 2004	IMP
			IDA
Plant Growth and Development Stage	SE.00 stem elongation begins stage (PO:0007079)	Nonomura-K et al., 2004	IDA
	C tetrad of megaspores stage (PO:0007625)	Nonomura-K et al., 2004	IDA
	integument initiation stage (PO:0007622)	Nonomura-K et al., 2004	IDA
	D pollen mother cell meiosis stage (PO:0001009)	Nonomura-K et al., 2004	IDA
	A megaspore mother cell enlarges stage (PO:0007623)	Nonomura-K et al., 2004	IDA
	B meiosis of megaspore mother cell stage (PO:0007624)	Nonomura-K et al., 2004	IDA
Trait	male sterility (TO:0000437)	Jaiswal-P et al., 2006	IC
	meiotic cell cycle trait (TO:0000729)	Jaiswal-P et al., 2006	IC
	female sterility (TO:0000358)	Jaiswal-P et al., 2006	IC

Term Type

Term

Reference

Evidence

Biological Process

Feature Type	Residues (From - To)	Evidence
Pfam (Info)	Not available
Prosite (Info)	Not available
Physio-chemical features	Q75RY2
ProtoMap (Info)	PAIR1_ORYSA
Nuclear localization signal	479 - 483	Nonomura-K et al., 2004