The following text describes a protein:
Function:
Non-catalytic component of the polycomb repressive deubiquitinase (PR-DUB) complex, a complex that specifically mediates deubiquitination of histone H2A monoubiquitinated at 'Lys-119' (H2AK118ub1). Activator of the PR-DUB complex involved in ubiquitin binding and allosteric activation of calypso deubiquitinase activity. PR-DUB does not deubiquitinate monoubiquitinated histone H2B. PR-DUB is 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. Atypical Polycomb group protein, which may be involved in both Polycomb group (PcG) and trithorax group (trxG) complexes. 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 (Probable). PcG and trxG protein complexes are not required to initiate repression and activation, but to maintain it during later stages of development (Probable).
Subcellular Localization:
Nucleus. Chromosome. Note=Associated with chromatin. Colocalizes with many PcG sites on polytene chromosomes. It also associates with many unique sites on polytene chromosomes.
Domain:
The DEUBAD domain is involved in modulation of the ubiquitin C-terminal hydrolase activity of caly/calypso. It contains two Leu-Xaa-Xaa-Leu-Leu (LXXLL) motifs involved in the interaction with caly/calypso. It also contains an Asn-Glu-Phe (NEF) motif involved in stabilizing the association of the PR-DUB complex with ubiquitin to promote deubiquitinase activity.
Sequence:
MKTITPDTTTTTSSQHQQLLIPQADQHHQPMLQQQSLLAAPPPTMIMEHVNLVDDDEKDPLALEQLEVSPSTKHTHSLRRHLPRIIVKPIPPEKKPMAPSEEAAVSTAPAPPTRLICSRRIQQQQQVKAAAAAAAAAAAAAAAAAAAAQAQATSSYPSAISPGSKAGTSQASTMREVLASIPGFSVKPRRRSNKKLTTAAQIEQTKDGKIDLETPDSILASTNLRALLNKQTFSLLPPLYQYNLIQLLPSVDREASELEQPSSSASGGSPSEAIRLSASCLNNEFFARACLEWRERLSEGEFTPENQLKLKTEAEREKNKLDPWKLKHFEPFWGEKNSRGKDKDKLESDCKNQKLSASIKSEPKPPATSQQKPLQQATCDNETELKFDLSTKCETTSAKTTVAVAVADKSSTFPPTGSQNNVLNEQQRRVLKRPSSSPSQRKQAPTTIATINLDDDLDELPSTSKDSKQPKMDEIVPNASGNVVAAPMVDVVDHSAVEMKIKDEQQHQRQHQPLINSTCDKIEPSECSKEMIVAMKQVDSKEDVDSIASAAAMPAIAAVTPHTPKPEALAPNPDVANQFVSYLQNVELAAETKAPLDNSNEADITTGTNSHDFVFSDTIDHAYFQEHQSTINHNFFTSSSSSNTATTAANKLEEHSDKPEDSPLPIASSISGSTPASSITSTSCTSSSSSSASMSSSCSSSNSGSTTTAPTTSSSAGAPTAPLTLAAAAETTLANVQAMLSTVAKLQQQQQELPVELNSNEMYQHVQHDWNFGDIKLSSSQSSGDQQRNLSHEAIDLMDVVQDADVIDDIMHNDVCHDVLGDEDEGDQEEDEDDEVVECMTEEQQLIDEDSEAVREIVDKLQQHQQQQNQQQHHQQLHIQDVVQLAQHSFMPQAHSEFGNDIGQEMLCDAVPMSAAEMEVSSTVITNSSNSNDSSNNISLCSSTNSLTINQMPHQASQQPQQNAQSNAQQQRQILVDSNGQIIGNFLLQQQRQQQQQQLLQQFTLQAAAAQQQQQQQQQHQQQQQQQQQATSSNSLGKTLPVALRNGTQQFLSPNLIAQQHQQQQQQQLEQHQQQATAQQKHQQIQQFALQQAQLHQRQLLAQAANNNLLQQQQQQQQNVALPTTQAKFIAKPLNIISMTRPANASPTTAATTANTASIPSAYANVVAVTGAQQQQSPPVPAPQQQTVQQQQLANHNSNMQQLPNVLTMKTLPPSGVPTTIAQQRLQPKMPTGKGRKATSNRLPPGAVNLERSYQICQAVIQNSPNRENLKAQLRPPAAILNQHQPTTTTAPAPINPVTLNVSTVAATPMSNITTATGSMAAAVAAAPPQNVLKQEELLVSGAVGAGALPAGLPPNVMGVGRPGVYKVIGPRMSGFPRKKYVQRKPSPTTLIRHVFSPGPGGATATAQQLQMLQQHHQSTTSPVPVQNPQQPAPEQLIHQNGNGQYVLVHRANVGAADNQAPRASSAPPMHQNQFVTVQNPLHSINGIPMGGRGRPASVDTTAGSGNVIAPPISATDALHHHHHEMQQQQQHQQPQPLGNVGAAANIVRRNIAAGPNIAYIDGSNTNSSAVALMEAGNNYIVTTNASPTAAPSPINQQPQSQPTGTQHQHPLLQLHQTGENTPPGNEATATANNCACSLNAMVICQQCGAFCHDDCIGAAKLCVACVIR