Protein: Polycomb group protein Asx (Protein additional sex combs) (Q9V727)
Organism: Drosophila melanogaster (Fruit fly)
Function: Atypical Polycomb group protein, which may be involved in both Polycomb group (PcG) and trithorax group (trxG) complexes. Non-catalytic component of the PR-DUB complex, a complex that specifically mediates deubiquitination of histone H2A monoubiquitinated at 'Lys-118' (H2AK118ub1). Does not deubiquitinate monoubiquitinated histone H2B. Required to maintain the transcriptionally repressive state of homeotic genes throughout development. The PR-DUB complex has weak or no activity toward 'Lys-48'- and 'Lys-63'-linked polyubiquitin chains. PcG and trxG proteins act by forming multiprotein complexes, which are respectively required to maintain the transcriptionally repressive and transcriptionally active state of homeotic genes throughout development. PcG and trxG protein complexes are not required to initiate repression and activation, but to maintain it during later stages of development.
Subcellular location: Nucleus {ECO:0000269|PubMed:9477319}. Chromosome {ECO:0000269|PubMed:9477319}. Note=Associated with chromatin. Colocalizes with many PcG sites on polytene chromosomes. It also associates with many unique sites on polytene chromosomes.
Interaction partners:
- Ubiquitin carboxyl-terminal hydrolase calypso
- Polycomb group protein Pc
- Polycomb protein esc
- E3 ubiquitin-protein ligase RING1
- Histone-lysine N-methyltransferase E
- Polycomb group protein Psc
- Polycomb protein Su
- Polycomb protein PHO
- UDP-N-acetylglucosamine--peptide N-acetylglucosaminyltransferase 110 kDa subunit
- Polyhomeotic-proximal chromatin protein
Sequence:
MKTITPDTTTTTSSQHQQLLIPQADQHHQPMLQQQSLLAAPPPTMIMEHVNLVDDDEKDPLALEQLEVSPSTKHTHSLRRHLPRIIVKPIPPEKKPMAPSEEAAVSTAPAPPTRLICSRRIQQQQQVKAAAAAAAAAAAAAAAAAAAAQAQATSSYPSAISPGSKAGTSQASTMREVLASIPGFSVKPRRRSNKKLTTAAQIEQTKDGKIDLETPDSILASTNLRALLNKQTFSLLPPLYQYNLIQLLPSVDREASELEQPSSSASGGSPSEAIRLSASCLNNEFFARACLEWRERLSEGEFTPENQLKLKTEAEREKNKLDPWKLKHFEPFWGEKNSRGKDKDKLESDCKNQKLSASIKSEPKPPATSQQKPLQQATCDNETELKFDLSTKCETTSAKTTVAVAVADKSSTFPPTGSQNNVLNEQQRRVLKRPSSSPSQRKQAPTTIATINLDDDLDELPSTSKDSKQPKMDEIVPNASGNVVAAPMVDVVDHSAVEMKIKDEQQHQRQHQPLINSTCDKIEPSECSKEMIVAMKQVDSKEDVDSIASAAAMPAIAAVTPHTPKPEALAPNPDVANQFVSYLQNVELAAETKAPLDNSNEADITTGTNSHDFVFSDTIDHAYFQEHQSTINHNFFTSSSSSNTATTAANKLEEHSDKPEDSPLPIASSISGSTPASSITSTSCTSSSSSSASMSSSCSSSNSGSTTTAPTTSSSAGAPTAPLTLAAAAETTLANVQAMLSTVAKLQQQQQELPVELNSNEMYQHVQHDWNFGDIKLSSSQSSGDQQRNLSHEAIDLMDVVQDADVIDDIMHNDVCHDVLGDEDEGDQEEDEDDEVVECMTEEQQLIDEDSEAVREIVDKLQQHQQQQNQQQHHQQLHIQDVVQLAQHSFMPQAHSEFGNDIGQEMLCDAVPMSAAEMEVSSTVITNSSNSNDSSNNISLCSSTNSLTINQMPHQASQQPQQNAQSNAQQQRQILVDSNGQIIGNFLLQQQRQQQQQQLLQQFTLQAAAAQQQQQQQQQHQQQQQQQQQATSSNSLGKTLPVALRNGTQQFLSPNLIAQQHQQQQQQQLEQHQQQATAQQKHQQIQQFALQQAQLHQRQLLAQAANNNLLQQQQQQQQNVALPTTQAKFIAKPLNIISMTRPANASPTTAATTANTASIPSAYANVVAVTGAQQQQSPPVPAPQQQTVQQQQLANHNSNMQQLPNVLTMKTLPPSGVPTTIAQQRLQPKMPTGKGRKATSNRLPPGAVNLERSYQICQAVIQNSPNRENLKAQLRPPAAILNQHQPTTTTAPAPINPVTLNVSTVAATPMSNITTATGSMAAAVAAAPPQNVLKQEELLVSGAVGAGALPAGLPPNVMGVGRPGVYKVIGPRMSGFPRKKYVQRKPSPTTLIRHVFSPGPGGATATAQQLQMLQQHHQSTTSPVPVQNPQQPAPEQLIHQNGNGQYVLVHRANVGAADNQAPRASSAPPMHQNQFVTVQNPLHSINGIPMGGRGRPASVDTTAGSGNVIAPPISATDALHHHHHEMQQQQQHQQPQPLGNVGAAANIVRRNIAAGPNIAYIDGSNTNSSAVALMEAGNNYIVTTNASPTAAPSPINQQPQSQPTGTQHQHPLLQLHQTGENTPPGNEATATANNCACSLNAMVICQQCGAFCHDDCIGAAKLCVACVIR