E3 ubiquitin-protein ligase that mediates ubiquitination and subsequent proteasomal degradation of target proteins. E3 ubiquitin ligases accept ubiquitin from an E2 ubiquitin-conjugating enzyme in the form of a thioester and then directly transfers the ubiquitin to targeted substrates. It probably triggers the ubiquitin-mediated degradation of different substrates. Arabidopsis thaliana (taxid: 3702) EC: 6EC: .EC: 3EC: .EC: 2EC: .EC: -
E3 ubiquitin-protein ligase that mediates ubiquitination and subsequent proteasomal degradation of target proteins. E3 ubiquitin ligases accept ubiquitin from an E2 ubiquitin-conjugating enzyme in the form of a thioester and then directly transfers the ubiquitin to targeted substrates. It probably triggers the ubiquitin-mediated degradation of different substrates.
E3 ubiquitin-protein ligase that mediates ubiquitination and subsequent proteasomal degradation of target proteins. E3 ubiquitin ligases accept ubiquitin from an E2 ubiquitin-conjugating enzyme in the form of a thioester and then directly transfers the ubiquitin to targeted substrates. It probably triggers the ubiquitin-mediated degradation of different substrates.
E3 ubiquitin-protein ligase that mediates ubiquitination and subsequent proteasomal degradation of target proteins. E3 ubiquitin ligases accept ubiquitin from an E2 ubiquitin-conjugating enzyme in the form of a thioester and then directly transfers the ubiquitin to targeted substrates. It probably triggers the ubiquitin-mediated degradation of different substrates.
E3 ubiquitin-protein ligase that mediates ubiquitination and subsequent proteasomal degradation of target proteins. E3 ubiquitin ligases accept ubiquitin from an E2 ubiquitin-conjugating enzyme in the form of a thioester and then directly transfers the ubiquitin to targeted substrates. Mediates the ubiquitin-mediated degradation of NAC021/NAC022, a transcription activator that functions downstream of the auxin signals, thereby acting as a down-regulator of auxin signals. Involved in the formation of lateral roots.
Arabidopsis thaliana (taxid: 3702)
EC: 6
EC: .
EC: 3
EC: .
EC: 2
EC: .
EC: -
>sp|Q86MW9|SINA_SCHMA E3 ubiquitin-protein ligase sina OS=Schistosoma mansoni GN=SINA PE=1 SV=1
Score = 56.6 bits (135), Expect = 5e-08, Method: Composition-based stats.
Identities = 28/85 (32%), Positives = 43/85 (50%)
Query: 3 NCFARHFCLHFEAFHLGMAPVYVAFLRFMGDEEEARQFSYSLEVGGNGRKLTWQGIPRSI 62
+CF F L E ++ A ++ +G ++A QF Y LE+ G+ R+LTW+ PRSI
Sbjct: 268 SCFGHSFMLVLEKQERVPDQIFFALVQLIGTRKQADQFVYRLELNGHRRRLTWEACPRSI 327
Query: 63 RDSHKKVRDSQDGLIIQRNLALFFS 87
D + D L+ N A F+
Sbjct: 328 HDGVQSAIAVSDCLVFDSNTAHSFA 352
E3 ubiquitin-protein ligase that mediates ubiquitination and subsequent proteasomal degradation of target proteins. E3 ubiquitin ligases accept ubiquitin from an E2 ubiquitin-conjugating enzyme in the form of a thioester and then directly transfers the ubiquitin to targeted substrates. Mediates the ubiquitin-mediated degradation of nuclear receptors for retinoids SmRXR1 and SmRXR2.
Schistosoma mansoni (taxid: 6183)
EC: 6
EC: .
EC: 3
EC: .
EC: 2
EC: .
EC: -
>sp|Q8I147|SINA_DROWI E3 ubiquitin-protein ligase sina OS=Drosophila willistoni GN=sina PE=3 SV=1
Score = 56.2 bits (134), Expect = 5e-08, Method: Composition-based stats.
Identities = 28/86 (32%), Positives = 44/86 (51%), Gaps = 1/86 (1%)
Query: 3 NCFARHFCLHFEAFH-LGMAPVYVAFLRFMGDEEEARQFSYSLEVGGNGRKLTWQGIPRS 61
+CF HF L E + A ++ +G +EA F Y LE+ GN R+LTW+ +PRS
Sbjct: 232 SCFGHHFMLVLEKQEKYDGHQQFFAIVQLIGSRKEAENFVYRLELNGNRRRLTWEAMPRS 291
Query: 62 IRDSHKKVRDSQDGLIIQRNLALFFS 87
I + + D L+ ++A F+
Sbjct: 292 IHEGVASAIHNSDCLVFDTSIAQLFA 317
E3 ubiquitin-protein ligase that is required for specification of R7 photoreceptor cell fate in the eye by mediating the ubiquitination and subsequent proteasomal degradation of Tramtrack (ttk). E3 Ubiquitin ligases accept ubiquitin from an E2 ubiquitin-conjugating enzyme in the form of a thioester and then directly transfers the ubiquitin to targeted substrates. Acts via the formation of a complex with ebi and phyl that ubiquitinates the transcription repressor ttk, a general inhibitor of photoreceptor differentiation, in a subset of photoreceptor cells in the eye, leading to the differentiation of cells into neurons. Also involved in external sensory organ development.
Drosophila willistoni (taxid: 7260)
EC: 6
EC: .
EC: 3
EC: .
EC: 2
EC: .
EC: -
>sp|P29304|SINA_DROVI E3 ubiquitin-protein ligase sina OS=Drosophila virilis GN=sina PE=3 SV=1
Score = 56.2 bits (134), Expect = 5e-08, Method: Composition-based stats.
Identities = 28/86 (32%), Positives = 44/86 (51%), Gaps = 1/86 (1%)
Query: 3 NCFARHFCLHFEAFH-LGMAPVYVAFLRFMGDEEEARQFSYSLEVGGNGRKLTWQGIPRS 61
+CF HF L E + A ++ +G +EA F Y LE+ GN R+LTW+ +PRS
Sbjct: 215 SCFGHHFMLVLEKQEKYDGHQQFFAIVQLIGSRKEAENFVYRLELNGNRRRLTWEAMPRS 274
Query: 62 IRDSHKKVRDSQDGLIIQRNLALFFS 87
I + + D L+ ++A F+
Sbjct: 275 IHEGVASAIHNSDCLVFDTSIAQLFA 300
E3 ubiquitin-protein ligase that is required for specification of R7 photoreceptor cell fate in the eye by mediating the ubiquitination and subsequent proteasomal degradation of Tramtrack (ttk). E3 Ubiquitin ligases accept ubiquitin from an E2 ubiquitin-conjugating enzyme in the form of a thioester and then directly transfers the ubiquitin to targeted substrates. Acts via the formation of a complex with ebi and phyl that ubiquitinates the transcription repressor ttk, a general inhibitor of photoreceptor differentiation, in a subset of photoreceptor cells in the eye, leading to the differentiation of cells into neurons. Also involved in external sensory organ development.
Drosophila virilis (taxid: 7244)
EC: 6
EC: .
EC: 3
EC: .
EC: 2
EC: .
EC: -
>sp|P21461|SINA_DROME E3 ubiquitin-protein ligase sina OS=Drosophila melanogaster GN=sina PE=1 SV=2
Score = 56.2 bits (134), Expect = 5e-08, Method: Composition-based stats.
Identities = 28/86 (32%), Positives = 44/86 (51%), Gaps = 1/86 (1%)
Query: 3 NCFARHFCLHFEAFH-LGMAPVYVAFLRFMGDEEEARQFSYSLEVGGNGRKLTWQGIPRS 61
+CF HF L E + A ++ +G +EA F Y LE+ GN R+LTW+ +PRS
Sbjct: 215 SCFGHHFMLVLEKQEKYDGHQQFFAIVQLIGSRKEAENFVYRLELNGNRRRLTWEAMPRS 274
Query: 62 IRDSHKKVRDSQDGLIIQRNLALFFS 87
I + + D L+ ++A F+
Sbjct: 275 IHEGVASAIHNSDCLVFDTSIAQLFA 300
E3 ubiquitin-protein ligase that is required for specification of R7 photoreceptor cell fate in the eye by mediating the ubiquitination and subsequent proteasomal degradation of Tramtrack (ttk). E3 Ubiquitin ligases accept ubiquitin from an E2 ubiquitin-conjugating enzyme in the form of a thioester and then directly transfers the ubiquitin to targeted substrates. Acts via the formation of a complex with ebi and phyl that ubiquitinates the transcription repressor ttk, a general inhibitor of photoreceptor differentiation, in a subset of photoreceptor cells in the eye, leading to the differentiation of cells into neurons. Also involved in external sensory organ development.
Drosophila melanogaster (taxid: 7227)
EC: 6
EC: .
EC: 3
EC: .
EC: 2
EC: .
EC: -
>sp|P61093|SINA_DROER E3 ubiquitin-protein ligase sina OS=Drosophila erecta GN=sina PE=3 SV=1
Score = 56.2 bits (134), Expect = 5e-08, Method: Composition-based stats.
Identities = 28/86 (32%), Positives = 44/86 (51%), Gaps = 1/86 (1%)
Query: 3 NCFARHFCLHFEAFH-LGMAPVYVAFLRFMGDEEEARQFSYSLEVGGNGRKLTWQGIPRS 61
+CF HF L E + A ++ +G +EA F Y LE+ GN R+LTW+ +PRS
Sbjct: 215 SCFGHHFMLVLEKQEKYDGHQQFFAIVQLIGSRKEAENFVYRLELNGNRRRLTWEAMPRS 274
Query: 62 IRDSHKKVRDSQDGLIIQRNLALFFS 87
I + + D L+ ++A F+
Sbjct: 275 IHEGVASAIHNSDCLVFDTSIAQLFA 300
E3 ubiquitin-protein ligase that is required for specification of R7 photoreceptor cell fate in the eye by mediating the ubiquitination and subsequent proteasomal degradation of Tramtrack (ttk). E3 Ubiquitin ligases accept ubiquitin from an E2 ubiquitin-conjugating enzyme in the form of a thioester and then directly transfers the ubiquitin to targeted substrates. Acts via the formation of a complex with ebi and phyl that ubiquitinates the transcription repressor ttk, a general inhibitor of photoreceptor differentiation, in a subset of photoreceptor cells in the eye, leading to the differentiation of cells into neurons. Also involved in external sensory organ development.
Drosophila erecta (taxid: 7220)
EC: 6
EC: .
EC: 3
EC: .
EC: 2
EC: .
EC: -
Close Homologs in the Non-Redundant Database Detected by BLAST
>gi|297817142|ref|XP_002876454.1| seven in absentia family protein [Arabidopsis lyrata subsp. lyrata] gi|297322292|gb|EFH52713.1| seven in absentia family protein [Arabidopsis lyrata subsp. lyrata]
>gnl|CDD|239753 cd03829, Sina, Seven in absentia (Sina) protein family, C-terminal substrate binding domain; composed of the Drosophila Sina protein, the mammalian Sina homolog (Siah), the plant protein SINAT5, and similar proteins
Score = 156 bits (397), Expect = 4e-51
Identities = 36/101 (35%), Positives = 57/101 (56%), Gaps = 1/101 (0%)
Query: 1 VFNCFARHFCLHFEAFHL-GMAPVYVAFLRFMGDEEEARQFSYSLEVGGNGRKLTWQGIP 59
+ +CF HF L E L + AF++ +G E++A F+Y LE+ GN R+LTW+ P
Sbjct: 27 MQSCFGHHFMLVLEKQELYEGHQQFFAFVQLIGTEKQAENFTYRLELNGNRRRLTWEATP 86
Query: 60 RSIRDSHKKVRDSQDGLIIQRNLALFFSGGDRQELKLKVAG 100
RSIR+ H V D+ D L+ ++A FS + + ++G
Sbjct: 87 RSIREGHASVIDNSDCLVFDTSIAQLFSENGNLGINVTISG 127
Sina, Siah and SINAT5 are RING-containing proteins that function as E3 ubiquitin ligases, acting either as single proteins or as a part of multiprotein complexes. Sina is expressed in many cells in the developing eye but is essential specifically for R7 photoreceptor cell development. Sina cooperates with Phyllopod (Phyl), Ebi and the E2 ubiquitin-conjugating enzyme Ubcd1 to catalyze the ubiquitination and subsequent degradation of Tramtrack (Ttk88); Ttk88 is a transcriptional repressor that blocks photoreceptor differentiation. Similarly, the mammalian homologue Siah1 cooperates with SIP (Siah-interacting protein), Ebi and the adaptor protein Skp1, to target beta-catenin for ubiquitination and degradation via a p53-dependent mechanism. SINAT5 targets NAC1 for ubiquitin-mediated degradation resulting in the downregulation of auxin, a hormone that controls many aspects of plant development. Other targets of Sina family proteins include c-Myb, synaptophysin, group 1 glutamate receptors, promyelocytic leukemia protein, alpha-synuclein, synphilin-1 and alpha-ketoglutarate dehydrogenase, among others. Sina proteins also bind proteins that are not targets for ubiquitination such as Phyl, adenomatous polyposis coli, VAV, BAG-1 and Dab-1. Siah binds to a consensus motif, PXAXVXP, which is present in Siah-binding proteins. Siah is a dimeric protein consisting of an N-terminal RING domain, two zinc finger motifs and a C-terminal substrate-binding domain (SBD); this SBD contains an eight-stranded antiparallel beta-sandwich fold similar to the MATH (meprin and TRAF-C homology) domain. Length = 127
>gnl|CDD|190542 pfam03145, Sina, Seven in absentia protein family
Score = 135 bits (342), Expect = 5e-42
Identities = 47/98 (47%), Positives = 61/98 (62%), Gaps = 2/98 (2%)
Query: 1 VFNCFARHFCLHFEAFHLGMAPVYVAFLRFMGDEEEARQFSYSLEVGGNGRKLTWQGIPR 60
F+CF RHF L+ E + LG +Y A ++ +G+ +EA F+Y LE+GGN RKLTWQ PR
Sbjct: 102 QFSCFGRHFNLYLEKYDLGGTQMYFAVIQLIGERKEAENFAYELELGGNRRKLTWQAFPR 161
Query: 61 SIRDSHKKVRDSQDGLIIQRNLALFFSGGDRQELKLKV 98
SIRD HK D +D LI RN A FF+ L +V
Sbjct: 162 SIRDDHKFAIDGRDCLIFLRNAARFFAEDKN--LHYRV 197
The seven in absentia (sina) gene was first identified in Drosophila. The Drosophila Sina protein is essential for the determination of the R7 pathway in photoreceptor cell development: the loss of functional Sina results in the transformation of the R7 precursor cell to a non- neuronal cell type. The Sina protein contains an N-terminal RING finger domain pfam00097. Through this domain, Sina binds E2 ubiquitin-conjugating enzymes (UbcD1) Sina also interacts with Tramtrack (TTK88) via PHYL. Tramtrack is a transcriptional repressor that blocks photoreceptor determination, while PHYL down-regulates the activity of TTK88. In turn, the activity of PHYL requires the activation of the Sevenless receptor tyrosine kinase, a process essential for R7 determination. It is thought that thus Sina targets TTK88 for degradation, therefore promoting the R7 pathway. Murine and human homologues of Sina have also been identified. The human homologue Siah-1 also binds E2 enzymes (UbcH5) and through a series of physical interactions, targets beta-catenin for ubiquitin degradation. Siah-1 expression is enhanced by p53, itself promoted by DNA damage. Thus this pathway links DNA damage to beta-catenin degradation. Sina proteins, therefore, physically interact with a variety of proteins. The N-terminal RING finger domain that binds ubiquitin conjugating enzymes is described in pfam00097, and does not form part of the alignment for this family. The remainder C-terminal part is involved in interactions with other proteins, and is included in this alignment. In addition to the Drosophila protein and mammalian homologues, whose similarity was noted previously, this family also includes putative homologues from Caenorhabditis elegans, Arabidopsis thaliana. Length = 198
consensus Zn finger protein [General function pred
99.92
>cd03829 Sina Seven in absentia (Sina) protein family, C-terminal substrate binding domain; composed of the Drosophila Sina protein, the mammalian Sina homolog (Siah), the plant protein SINAT5, and similar proteins
Sina, Siah and SINAT5 are RING-containing proteins that function as E3 ubiquitin ligases, acting either as single proteins or as a part of multiprotein complexes. Sina is expressed in many cells in the developing eye but is essential specifically for R7 photoreceptor cell development. Sina cooperates with Phyllopod (Phyl), Ebi and the E2 ubiquitin-conjugating enzyme Ubcd1 to catalyze the ubiquitination and subsequent degradation of Tramtrack (Ttk88); Ttk88 is a transcriptional repressor that blocks photoreceptor differentiation. Similarly, the mammalian homologue Siah1 cooperates with SIP (Siah-interacting protein), Ebi and the adaptor protein Skp1, to target beta-catenin for ubiquitination and degradation via a p53-dependent mechanism. SINAT5 targets NAC1 for ubiquitin-medi
>PF03145 Sina: Seven in absentia protein family; InterPro: IPR018121 The seven in absentia (sina) gene was first identified in Drosophila
Probab=99.96 E-value=2.8e-30 Score=190.45 Aligned_cols=96 Identities=45% Similarity=0.760 Sum_probs=86.2
Q ss_pred eeecCceeEEEEeeeecCCccEEEEEEEeeCCHHhHcCceEEEEEcCCCeEEEEeecccchhhhhhhhhcCCCeeEEecc
Q 039313 2 FNCFARHFCLHFEAFHLGMAPVYVAFLRFMGDEEEARQFSYSLEVGGNGRKLTWQGIPRSIRDSHKKVRDSQDGLIIQRN 81 (100)
Q Consensus 2 ~sCfg~hF~l~lek~~~~~~~~f~A~vqliG~~~eA~nF~Y~LEl~g~~RrLtWEa~PRSI~e~~~~a~~~~DcLv~~~~ 81 (100)
++|+|++|+|++++++..+.++|+++||+||++++|++|+|.||+.+++|||+||++|+||+++++.++++.||||++.+
T Consensus 103 ~~~~~~~F~l~~~~~~~~~~~v~~~~v~~~G~~~~a~~f~Yel~~~~~~rkl~~~~~p~si~~~~~~~~~~~d~li~~~~ 182 (198)
T PF03145_consen 103 FSCFGKLFLLYVQKFELEGNAVYFAVVCYIGPAEEASNFSYELEVRSNGRKLTWQSFPRSIREDIDDAIESRDCLIINEN 182 (198)
T ss_dssp -EETTEEEEEEEEEEEEETEEEEEEEEEESS-HHHHTTEEEEEEEEETTEEEEEEE--EETTT-SHHHHHCT-SEEEEHH
T ss_pred cccCCccEEEEEEEEccCCceEEEEEEEEccCchhhhceEEEEEEecCCcEEEEEEcCcchhhhHHhhccCCcEEEEchH
Confidence 38999999999999998899999999999999999999999999999999999999999999999999999999999999
Q ss_pred eeeeeecCCeeeEEEE
Q 039313 82 LALFFSGGDRQELKLK 97 (100)
Q Consensus 82 ~A~~Fa~~~~~~i~l~ 97 (100)
+|++|++||+|.++++
T Consensus 183 ~~~~f~~~~~L~~~v~ 198 (198)
T PF03145_consen 183 AAQFFSEDGNLRYRVT 198 (198)
T ss_dssp HHHHHECTTEEEEEEE
T ss_pred HHHhcCCCCeEEEEeC
Confidence 9999999998655553
The Drosophila Sina protein is essential for the determination of the R7 pathway in photoreceptor cell development: the loss of functional Sina results in the transformation of the R7 precursor cell to a non-neuronal cell type. The Sina protein contains an N-terminal RING finger domain C3HC4-type. Through this domain, Sina binds E2 ubiquitin-conjugating enzymes (UbcD1) Sina also interacts with Tramtrack (TTK88) via PHYL. Tramtrack is a transcriptional repressor that blocks photoreceptor determination, while PHYL down-regulates the activity of TTK88. In turn, the activity of PHYL requires the activation of the Sevenless receptor tyrosine kinase, a process essential for R7 determination. It is thought that Sina targets TTK88 for degradation, therefore promoting the R7 pathway. Murine and human homologues of Sina have also been identified. The human homologue Siah-1 [] also binds E2 enzymes (UbcH5) and through a series of physical interactions, targets beta-catenin for ubiquitin degradation. Siah-1 expression is enhanced by p53, itself promoted by DNA damage. Thus this pathway links DNA damage to beta-catenin degradation [, ]. Sina proteins, therefore, physically interact with a variety of proteins. The N-terminal RING finger domain that binds ubiquitin conjugating enzymes is a C3HC4-type, and does not form part of the alignment for this family. The remainder C-terminal part is involved in interactions with other proteins, and is included in this alignment. In addition to the Drosophila protein and mammalian homologues, whose similarity was noted previously, this family also includes putative homologues from Caenorhabditis elegans, Arabidopsis thaliana.; GO: 0006511 ubiquitin-dependent protein catabolic process, 0007275 multicellular organismal development, 0005634 nucleus; PDB: 2A25_A 1K2F_B 2AN6_C.
>KOG3002 consensus Zn finger protein [General function prediction only]
