Score = 56.6 bits (135), Expect = 4e-08, Method: Compositional matrix adjust.
Identities = 33/90 (36%), Positives = 51/90 (56%), Gaps = 8/90 (8%)
Query: 19 PPA-HFILKIEAFSSLVENDVEKYGSLEFDAGGYKWKLVVYPNGNKNENVKDHISVYLAM 77
PP+ F I F+ L + K+ S F GGYKW+++++P GN NV DH+S+YL +
Sbjct: 51 PPSLKFTWTIPMFTRL---NTRKHYSDVFVVGGYKWRILIFPKGN---NV-DHLSMYLDV 103
Query: 78 VDTSSFGLGWEVYVIFRLFVLDQKKDEFLI 107
D ++ GW Y F L V++Q + + I
Sbjct: 104 ADAANLPYGWSRYSQFSLAVVNQVNNRYSI 133
Recognizes and hydrolyzes the peptide bond at the C-terminal Gly of ubiquitin. Involved in the processing of poly-ubiquitin precursors as well as that of ubiquitinated proteins. Arabidopsis thaliana (taxid: 3702) EC: 3EC: .EC: 4EC: .EC: 1EC: 9EC: .EC: 1EC: 2
Score = 56.2 bits (134), Expect = 5e-08, Method: Compositional matrix adjust.
Identities = 32/82 (39%), Positives = 45/82 (54%), Gaps = 7/82 (8%)
Query: 19 PPAHFILKIEAFSSLVENDVEKYGSLEFDAGGYKWKLVVYPNGNKNENVKDHISVYLAMV 78
P F I FS + K+ S F GGYKW+++++P GN NV DH+S+YL +
Sbjct: 53 PTLKFTWTIPNFSR---QNTRKHYSDVFVVGGYKWRILIFPKGN---NV-DHLSMYLDVS 105
Query: 79 DTSSFGLGWEVYVIFRLFVLDQ 100
D +S GW Y F L V++Q
Sbjct: 106 DAASLPYGWSRYAQFSLAVVNQ 127
Recognizes and hydrolyzes the peptide bond at the C-terminal Gly of ubiquitin. Involved in the processing of poly-ubiquitin precursors as well as that of ubiquitinated proteins.
Arabidopsis thaliana (taxid: 3702)
EC: 3
EC: .
EC: 4
EC: .
EC: 1
EC: 9
EC: .
EC: 1
EC: 2
>sp|A1L4W5|BPM6_ARATH BTB/POZ and MATH domain-containing protein 6 OS=Arabidopsis thaliana GN=BPM6 PE=1 SV=1
Score = 46.2 bits (108), Expect = 6e-05, Method: Composition-based stats.
Identities = 30/102 (29%), Positives = 49/102 (48%), Gaps = 9/102 (8%)
Query: 3 NDFVDQVEI---SRSISHVPPAHFILKIEAFSSLVENDVEKY-GSLEFDAGGYKWKLVVY 58
N DQ+E SRS++ I+ +S V K+ S F GGY+W + VY
Sbjct: 15 NTIPDQIESPTSSRSVTQTTNGSHQFVIQGYSLAKGIGVGKHIASDNFSVGGYQWTIFVY 74
Query: 59 PNGNKNENVKDHISVYLAMVDTSSFGLGWEVYVIFRLFVLDQ 100
P+G E+ ++SV++ + + EV +F L ++DQ
Sbjct: 75 PDGKNPEDNSSYVSVFIVLASECT-----EVRALFELSLVDQ 111
May act as a substrate-specific adapter of an E3 ubiquitin-protein ligase complex (CUL3-RBX1-BTB) which mediates the ubiquitination and subsequent proteasomal degradation of target proteins.
Arabidopsis thaliana (taxid: 3702)
>sp|Q1EBV6|BPM5_ARATH BTB/POZ and MATH domain-containing protein 5 OS=Arabidopsis thaliana GN=BPM5 PE=1 SV=1
May act as a substrate-specific adapter of an E3 ubiquitin-protein ligase complex (CUL3-RBX1-BTB) which mediates the ubiquitination and subsequent proteasomal degradation of target proteins.
Arabidopsis thaliana (taxid: 3702)
>sp|Q9M8J9|BPM2_ARATH BTB/POZ and MATH domain-containing protein 2 OS=Arabidopsis thaliana GN=BPM2 PE=1 SV=1
Score = 42.7 bits (99), Expect = 7e-04, Method: Composition-based stats.
Identities = 24/81 (29%), Positives = 41/81 (50%), Gaps = 6/81 (7%)
Query: 25 LKIEAFSSLVENDVEKY-GSLEFDAGGYKWKLVVYPNGNKNENVKDHISVYLAMVDTSSF 83
KI +S + + KY S F GGY W + YP+G E+ ++S+++A+
Sbjct: 37 FKISGYSLVKGMGIGKYVASDTFMVGGYSWAIYFYPDGKSPEDNSVYVSLFIALASE--- 93
Query: 84 GLGWEVYVIFRLFVLDQKKDE 104
G +V +F L ++DQ +E
Sbjct: 94 --GADVRALFELTLVDQSGNE 112
May act as a substrate-specific adapter of an E3 ubiquitin-protein ligase complex (CUL3-RBX1-BTB) which mediates the ubiquitination and subsequent proteasomal degradation of target proteins.
Arabidopsis thaliana (taxid: 3702)
Close Homologs in the Non-Redundant Database Detected by BLAST
>gi|18401489|ref|NP_566576.1| TRAF-like family protein [Arabidopsis thaliana] gi|332642426|gb|AEE75947.1| TRAF-like family protein [Arabidopsis thaliana]
>gnl|CDD|238068 cd00121, MATH, MATH (meprin and TRAF-C homology) domain; an independent folding unit with an eight-stranded beta-sandwich structure found in meprins, TRAFs and other proteins
Score = 67.8 bits (166), Expect = 5e-16
Identities = 26/83 (31%), Positives = 40/83 (48%), Gaps = 5/83 (6%)
Query: 22 HFILKIEAFSSLVENDVEKYGSLEFDAGGYKWKLVVYPNGNKNENVKDHISVYLAMVDTS 81
KI FS L + S F+ GGYKW++ +YPNG+ D++S+YL +
Sbjct: 2 KHTWKIVNFSELEGESIY---SPPFEVGGYKWRIRIYPNGDGES--GDYLSLYLELDKGE 56
Query: 82 SFGLGWEVYVIFRLFVLDQKKDE 104
S W V F L +++Q +
Sbjct: 57 SDLEKWSVRAEFTLKLVNQNGGK 79
Meprins comprise a class of extracellular metalloproteases which are anchored to the membrane and are capable of cleaving growth factors, extracellular matrix proteins, and biologically active peptides. TRAF molecules serve as adapter proteins that link cell surface receptors of the Tumor Necrosis Factor and 1nterleukin-1/Toll-like families to downstream kinase cascades, which results in the activation of transcription factors and the regulation of cell survival, proliferation and stress responses in the immune and inflammatory systems. Other members include the ubiquitin ligases, TRIM37 and SPOP, and the ubiquitin-specific proteases, HAUSP and Ubp21p. A large number of uncharacterized members mostly from lineage-specific expansions in C. elegans and rice contain MATH and BTB domains, similar to SPOP. The MATH domain has been shown to bind peptide/protein substrates in TRAFs and HAUSP. It is possible that the MATH domain in other members of this superfamily also interacts with various protein substrates. The TRAF domain may also be involved in the trimerization of TRAFs. Based on homology, it is postulated that the MATH domain in meprins may be involved in its tetramer assembly and that the MATH domain, in general, may take part in diverse modular arrangements defined by adjacent multimerization domains. Length = 126
Score = 37.7 bits (88), Expect = 1e-04
Identities = 16/75 (21%), Positives = 25/75 (33%), Gaps = 9/75 (12%)
Query: 26 KIEAFSSLVENDVEKYGSLEFDAGGYKWKLVVYPNGNKNENVKDHISVYLAMVDTSSFGL 85
+ S L E E Y S + W+L +Y +S+YL
Sbjct: 5 TFKNVSRLEEG--ESYFSPSEEHFNIPWRLKIYRKN-------GFLSLYLHCEKEECDSR 55
Query: 86 GWEVYVIFRLFVLDQ 100
W + F L ++ Q
Sbjct: 56 KWSIEAEFTLKLVSQ 70
Length = 95
>gnl|CDD|239744 cd03775, MATH_Ubp21p, Ubiquitin-specific protease 21 (Ubp21p) family, MATH domain; composed of fungal proteins with similarity to Ubp21p of fission yeast
Score = 37.7 bits (88), Expect = 2e-04
Identities = 16/56 (28%), Positives = 31/56 (55%), Gaps = 7/56 (12%)
Query: 21 AHFILKIEAFSSLVENDVEKYGSLEFDAGGYKWKLVVYPNGNKNENVKDHISVYLA 76
F +I+ +S L + K S +F GG++W+++++P GN + +S+YL
Sbjct: 1 QSFTWRIKNWSELEK----KVHSPKFKCGGFEWRILLFPQGN---SQTGGVSIYLE 49
Ubp21p is a deubiquitinating enzyme that may be involved in the regulation of the protein kinase Prp4p, which controls the formation of active spliceosomes. Members of this family are similar to human HAUSP (Herpesvirus-associated ubiquitin-specific protease) in that they contain an N-terminal MATH domain and a C-terminal catalytic protease (C19 family) domain. HAUSP is also an ubiquitin-specific protease that specifically catalyzes the deubiquitylation of p53 and MDM2. The MATH domain of HAUSP contains the binding site for p53 and MDM2. Similarly, the MATH domain of members in this family may be involved in substrate binding. Length = 134
Score = 34.8 bits (80), Expect = 0.004
Identities = 26/110 (23%), Positives = 39/110 (35%), Gaps = 17/110 (15%)
Query: 9 VEISRSISHVPP-------AHFILKIEAFSSLVENDVEKYGSLEFDAGGYKWKLVVYPNG 61
I + P F K++ +S L + K S F GG+ WK++++P G
Sbjct: 20 KSIGSILPQFDPDVEELLEMSFTWKVKRWSELAK----KVESPPFSVGGHTWKIILFPQG 75
Query: 62 NKNENVKDHISVYLAMVDTSSFGLGWEVYVIFRLF--VLDQKKDEFLILQ 109
N NV SVYL G + Y F + K +
Sbjct: 76 NNQCNV----SVYLEYEPQELEETGGKYYDCCAQFAFDISNPKYPTIEYI 121
>cd03775 MATH_Ubp21p Ubiquitin-specific protease 21 (Ubp21p) family, MATH domain; composed of fungal proteins with similarity to Ubp21p of fission yeast
Ubp21p is a deubiquitinating enzyme that may be involved in the regulation of the protein kinase Prp4p, which controls the formation of active spliceosomes. Members of this family are similar to human HAUSP (Herpesvirus-associated ubiquitin-specific protease) in that they contain an N-terminal MATH domain and a C-terminal catalytic protease (C19 family) domain. HAUSP is also an ubiquitin-specific protease that specifically catalyzes the deubiquitylation of p53 and MDM2. The MATH domain of HAUSP contains the binding site for p53 and MDM2. Similarly, the MATH domain of members in this family may be involved in substrate binding.
>cd03780 MATH_TRAF5 Tumor Necrosis Factor Receptor (TNFR)-Associated Factor (TRAF) family, TRAF5 subfamily, TRAF domain, C-terminal MATH subdomain; TRAF molecules serve as adapter proteins that link TNFRs and downstream kinase cascades resulting in the activation of transcription factors and the regulation of cell survival, proliferation and stress responses
TRAF5 was identified as an activator of nuclear factor-kappaB and a regulator of lymphotoxin-beta receptor and CD40 signaling. Its interaction with CD40 is indirect, involving hetero-oligomerization with TRAF3. In addition, TRAF5 has been shown to associate with other TNFRs including CD27, CD30, OX40 and GITR (glucocorticoid-induced TNFR). It plays a role in modulating Th2 immune responses (driven by OX40 costimulation) and T-cell activation (triggered by GITR). It is also involved in osteoclastogenesis. TRAF5 contains a RING finger domain, five zinc finger domains, and a TRAF domain. The TRAF domain can be divided into a more dive
>cd03774 MATH_SPOP Speckle-type POZ protein (SPOP) family, MATH domain; composed of proteins with similarity to human SPOP
SPOP was isolated as a novel antigen recognized by serum from a scleroderma patient, whose overexpression in COS cells results in a discrete speckled pattern in the nuclei. It contains an N-terminal MATH domain and a C-terminal BTB (also called POZ) domain. Together with Cul3, SPOP constitutes an ubiquitin E3 ligase which is able to ubiquitinate the PcG protein BMI1, the variant histone macroH2A1 and the death domain-associated protein Daxx. Therefore, SPOP may be involved in the regulation of these proteins and may play a role in transcriptional regulation, apoptosis and X-chromosome inactivation. Cul3 binds to the BTB domain of SPOP whereas Daxx and the macroH2A1 nonhistone region have been shown to bind to the MATH domain. Both MATH and BTB domains are necessary for the nuclear speckled accumulation of SPOP. There are many proteins, mostly uncharacterized, conta
>cd00270 MATH_TRAF_C Tumor Necrosis Factor Receptor (TNFR)-Associated Factor (TRAF) family, TRAF domain, C-terminal MATH subdomain; TRAF molecules serve as adapter proteins that link cell surface TNFRs and receptors of the interleukin-1/Toll-like family to downstream kinase signaling cascades which results in the activation of transcription factors and the regulation of cell survival, proliferation and stress responses in the immune and inflammatory systems
There are at least six mammalian and three Drosophila proteins containing TRAF domains. The mammalian TRAFs display varying expression profiles, indicating independent and cell type-specific regulation. They display distinct, as well as overlapping functions and interactions with receptors. Most TRAFs, except TRAF1, share N-terminal homology and contain a RING domain, multiple zinc finger domains, and a TRAF domain. TRAFs form homo- and heterotrimers through its TRAF domain. The TRAF domain can be divided into a more divergent N-ter
>cd03771 MATH_Meprin Meprin family, MATH domain; Meprins are multidomain, highly glycosylated extracellular metalloproteases, which are either anchored to the membrane or secreted into extracellular spaces
They are expressed in renal and intestinal brush border membranes, leukocytes, and cancer cells, and are capable of cleaving growth factors, cytokines, extracellular matrix proteins, and biologically active peptides. Meprin proteases are composed of two related subunits, alpha and beta, which form homo- or hetro-complexes where the basic unit is a disulfide-linked dimer. Despite their similarity, the two subunits differ in their ability to self-associate, in proteolytic processing during biosynthesis and in substrate specificity. Both subunits are synthesized as membrane spanning proteins, however, the alpha subunit is cleaved during biosynthesis and loses its transmembrane domain. Meprin beta forms homodimers or heterotetramers while meprin alpha oligomerizes into large complexes co
>cd03776 MATH_TRAF6 Tumor Necrosis Factor Receptor (TNFR)-Associated Factor (TRAF) family, TRAF6 subfamily, TRAF domain, C-terminal MATH subdomain; composed of proteins with similarity to human TRAF6, including the Drosophila protein DTRAF2
TRAF molecules serve as adapter proteins that link TNFRs and downstream kinase cascades resulting in the activation of transcription factors and the regulation of cell survival, proliferation and stress responses. TRAF6 is the most divergent in its TRAF domain among the mammalian TRAFs. In addition to mediating TNFR family signaling, it is also an essential signaling molecule of the interleukin-1/Toll-like receptor superfamily. Whereas other TRAF molecules display similar and overlapping TNFR-binding specificities, TRAF6 binds completely different sites on receptors such as CD40 and RANK. TRAF6 serves as a molecular bridge between innate and adaptive immunity and plays a central role in osteoimmunology. DTRAF2, as an activator of nuclear factor-kapp
>cd03777 MATH_TRAF3 Tumor Necrosis Factor Receptor (TNFR)-Associated Factor (TRAF) family, TRAF3 subfamily, TRAF domain; TRAF molecules serve as adapter proteins that link TNFRs and downstream kinase cascades resulting in the activation of transcription factors and the regulation of cell survival, proliferation and stress responses
TRAF3 was first described as a molecule that binds the cytoplasmic tail of CD40. However, it is not required for CD40 signaling. More recently, TRAF3 has been identified as a key regulator of type I interferon (IFN) production and the mammalian innate antiviral immunity. It mediates IFN responses in Toll-like receptor (TLR)-dependent as well as TLR-independent viral recognition pathways. It is also a key element in immunological homeostasis through its regulation of the anti-inflammatory cytokine interleukin-10. TRAF3 contains a RING finger domain, five zinc finger domains, and a TRAF domain. The TRAF domain can be divided into a more divergent N-terminal al
>cd03781 MATH_TRAF4 Tumor Necrosis Factor Receptor (TNFR)-Associated Factor (TRAF) family, TRAF4 subfamily, TRAF domain, C-terminal MATH subdomain; composed of proteins with similarity to human TRAF4, including the Drosophila protein DTRAF1
TRAF molecules serve as adapter proteins that link TNFRs and downstream kinase cascades resulting in the activation of transcription factors and the regulation of cell survival, proliferation and stress responses. TRAF4 is highly expressed during embryogenesis, especially in the central and peripheral nervous system. Studies using TRAF4-deficient mice show that TRAF4 is required for neurogenesis, as well as the development of the trachea and the axial skeleton. In addition, TRAF4 augments nuclear factor-kappaB activation triggered by GITR (glucocorticoid-induced TNFR), a receptor expressed in T-cells, B-cells and macrophages. It also participates in counteracting the signaling mediated by Toll-like receptors through its association with TRAF6 and TR
>cd03773 MATH_TRIM37 Tripartite motif containing protein 37 (TRIM37) family, MATH domain; TRIM37 is a peroxisomal protein and is a member of the tripartite motif (TRIM) protein subfamily, also known as the RING-B-box-coiled-coil (RBCC) subfamily of zinc-finger proteins
Mutations in the human TRIM37 gene (also known as MUL) cause Mulibrey (muscle-liver-brain-eye) nanism, a rare growth disorder of prenatal onset characterized by dysmorphic features, pericardial constriction and hepatomegaly. TRIM37, similar to other TRIMs, contains a cysteine-rich, zinc-binding RING-finger domain followed by another cysteine-rich zinc-binding domain, the B-box, and a coiled-coil domain. TRIM37 is autoubiquitinated in a RING domain-dependent manner, indicating that it functions as an ubiquitin E3 ligase. In addition to the tripartite motif, TRIM37 also contains a MATH domain C-terminal to the coiled-coil domain. The MATH domain of TRIM37 has been shown to interact with the TRAF domain of six known TRAFs i
>cd03772 MATH_HAUSP Herpesvirus-associated ubiquitin-specific protease (HAUSP, also known as USP7) family, N-terminal MATH (TRAF-like) domain; composed of proteins similar to human HAUSP, an enzyme that specifically catalyzes the deubiquitylation of p53 and MDM2, hence playing an important role in the p53-MDM2 pathway
It contains an N-terminal TRAF-like domain and a C-terminal catalytic protease (C19 family) domain. The tumor suppressor p53 protein is a transcription factor that responds to many cellular stress signals and is regulated primarily through ubiquitylation and subsequent degradation. MDM2 is a RING-finger E3 ubiquitin ligase that promotes p53 ubiquitinylation. p53 and MDM2 bind to the same site in the N-terminal TRAF-like domain of HAUSP in a mutually exclusive manner. HAUSP also interacts with the Epstein-Barr nuclear antigen 1 (EBNA1) protein of the Epstein-Barr virus (EBV), which efficiently immortalizes infected cells predisposing the host to a variety of cancers. EBNA1
>cd03779 MATH_TRAF1 Tumor Necrosis Factor Receptor (TNFR) Associated Factor (TRAF) family, TRAF1 subfamily, TRAF domain, C-terminal MATH subdomain; TRAF molecules serve as adapter proteins that link TNFRs and downstream kinase cascades resulting in the activation of transcription factors and the regulation of cell survival, proliferation and stress responses
TRAF1 expression is the most restricted among the TRAFs. It is found exclusively in activated lymphocytes, dendritic cells and certain epithelia. TRAF1 associates, directly or indirectly through heterodimerization with TRAF2, with the TNFR family receptors TNFR-2, CD30, RANK, CD40 and LMP1, among others. It also binds the intracellular proteins TRADD, TANK, TRIP, RIP1, RIP2 and FLIP. TRAF1 is unique among the TRAFs in that it lacks a RING domain, which is critical for the activation of nuclear factor-kappaB and Jun NH2-terminal kinase. Studies on TRAF1-deficient mice suggest that TRAF1 has a negative regulatory role in TNFR-mediat
>cd03778 MATH_TRAF2 Tumor Necrosis Factor Receptor (TNFR) Associated Factor (TRAF) family, TRAF2 subfamily, TRAF domain; TRAF molecules serve as adapter proteins that link TNFRs and downstream kinase cascades resulting in the activation of transcription factors and the regulation of cell survival, proliferation and stress responses
TRAF2 associates with the receptors TNFR-1, TNFR-2, RANK (which mediates differentiation and maturation of osteoclasts) and CD40 (which is important for the proliferation and activation of B cells), among others. It regulates distinct pathways that lead to the activation of nuclear factor-kappaB and Jun NH2-terminal kinases. TRAF2 also indirectly associates with death receptors through its interaction with TRADD (TNFR-associated death domain protein). It is involved in regulating oxidative stress or ROS-induced cell death and in the preconditioning of cells by sublethal stress for protection from subsequent injury. TRAF2 contains a RING finger domain, five z
>cd00121 MATH MATH (meprin and TRAF-C homology) domain; an independent folding unit with an eight-stranded beta-sandwich structure found in meprins, TRAFs and other proteins
Meprins comprise a class of extracellular metalloproteases which are anchored to the membrane and are capable of cleaving growth factors, extracellular matrix proteins, and biologically active peptides. TRAF molecules serve as adapter proteins that link cell surface receptors of the Tumor Necrosis Factor and 1nterleukin-1/Toll-like families to downstream kinase cascades, which results in the activation of transcription factors and the regulation of cell survival, proliferation and stress responses in the immune and inflammatory systems. Other members include the ubiquitin ligases, TRIM37 and SPOP, and the ubiquitin-specific proteases, HAUSP and Ubp21p. A large number of uncharacterized members mostly from lineage-specific expansions in C. elegans and rice contain MATH and BTB domains, similar to SPOP. The MATH doma
>cd03783 MATH_Meprin_Alpha Meprin family, Alpha subunit, MATH domain; Meprins are multidomain extracellular metalloproteases capable of cleaving growth factors, cytokines, extracellular matrix proteins, and biologically active peptides
They are composed of two related subunits, alpha and beta, which form homo- or hetro-complexes where the basic unit is a disulfide-linked dimer. The alpha subunit is synthesized as a membrane spanning protein, however, it is cleaved during biosynthesis and loses its transmembrane domain. It oligomerizes into large complexes, containing 10-100 subunits (dimers that associate noncovalently), which are secreted as latent proteases and can move through extracellular spaces in a nondestructive manner. This allows delivery of the concentrated protease to sites containing activating enzymes, such as sites of inflammation, infection or cancerous growth. Meprin alpha shows preference for small or hydrophobic residues at the P1 and P1' sites of its substrate. Both
>cd03782 MATH_Meprin_Beta Meprin family, Beta subunit, MATH domain; Meprins are multidomain extracellular metalloproteases capable of cleaving growth factors, cytokines, extracellular matrix proteins, and biologically active peptides
They are composed of two related subunits, alpha and beta, which form homo- or hetro-complexes where the basic unit is a disulfide-linked dimer. The beta subunit is a type I membrane protein, which forms homodimers or heterotetramers (alpha2beta2 or alpha3beta). Meprin beta shows preference for acidic residues at the P1 and P1' sites of its substrate. Among its best substrates are growth factors and chemokines such as gastrin and osteopontin. Both alpha and beta subunits contain a catalytic astacin (M12 family) protease domain followed by the adhesion or interaction domains MAM, MATH and AM. The MATH and MAM domains provide symmetrical intersubunit disulfide bonds necessary for the dimerization of meprin subunits. The MATH domain may also be required for f
>PF00917 MATH: MATH domain; InterPro: IPR002083 Although apparently functionally unrelated, intracellular TRAFs and extracellular meprins share a conserved region of about 180 residues, the meprin and TRAF homology (MATH) domain []
Meprins are mammalian tissue-specific metalloendopeptidases of the astacin family implicated in developmental, normal and pathological processes by hydrolysing a variety of proteins. Various growth factors, cytokines, and extracellular matrix proteins are substrates for meprins. They are composed of five structural domains: an N-terminal endopeptidase domain, a MAM domain (see PDOC00604 from PROSITEDOC), a MATH domain, an EGF-like domain (see PDOC00021 from PROSITEDOC) and a C-terminal transmembrane region. Meprin A and B form membrane bound homotetramer whereas homooligomers of meprin A are secreted. A proteolitic site adjacent to the MATH domain, only present in meprin A, allows the release of the protein from the membrane []. TRAF proteins were first isolated by their ability to interact with TNF receptors []. They promote cell survival by the activation of downstream protein kinases and, finally, transcription factors of the NF-kB and AP-1 family. The TRAF proteins are composed of 3 structural domains: a RING finger (see PDOC00449 from PROSITEDOC) in the N-terminal part of the protein, one to seven TRAF zinc fingers (see PDOC50145 from PROSITEDOC) in the middle and the MATH domain in the C-terminal part []. The MATH domain is necessary and sufficient for self-association and receptor interaction. From the structural analysis two consensus sequence recognised by the TRAF domain have been defined: a major one, [PSAT]x[QE]E and a minor one, PxQxxD []. The structure of the TRAF2 protein reveals a trimeric self-association of the MATH domain []. The domain forms a new, light-stranded antiparallel beta sandwich structure. A coiled-coil region adjacent to the MATH domain is also important for the trimerisation. The oligomerisation is essential for establishing appropriate connections to form signalling complexes with TNF receptor-1. The ligand binding surface of TRAF proteins is located in beta-strands 6 and 7 [].; GO: 0005515 protein binding; PDB: 1D00_E 1CZY_A 1D01_F 1CA9_A 1D0J_D 1F3V_B 1CA4_C 1D0A_A 1QSC_C 1CZZ_C ....
>COG5077 Ubiquitin carboxyl-terminal hydrolase [Posttranslational modification, protein turnover, chaperones]
>KOG1987 consensus Speckle-type POZ protein SPOP and related proteins with TRAF, MATH and BTB/POZ domains [Cell cycle control, cell division, chromosome partitioning; General function prediction only]
Score = 65.3 bits (159), Expect = 4e-15
Identities = 28/96 (29%), Positives = 40/96 (41%), Gaps = 8/96 (8%)
Query: 12 SRSISHVPPAHFILKIEAFSSLVENDVEKYGSLEFDAGG---YKWKLVVYPNGNKNENVK 68
S V ++ I FS E E S F +G KW L V P G +E K
Sbjct: 2 SGGSGKVVKFSYMWTINNFSFCREEMGEVIKSSTFSSGANDKLKWCLRVNPKGL-DEESK 60
Query: 69 DHISVYLAMVDTSSFGLGWEVYVIFRLFVLDQKKDE 104
D++S+YL + EV F+ +L+ K +E
Sbjct: 61 DYLSLYLLL----VSCPKSEVRAKFKFSILNAKGEE 92
class: All beta proteins
fold: TRAF domain-like
superfamily: TRAF domain-like
family: MATH domain
domain: TNF receptor associated factor 2 (TRAF2)
species: Human (Homo sapiens) [TaxId: 9606]
Score = 51.7 bits (123), Expect = 4e-10
Identities = 24/90 (26%), Positives = 34/90 (37%), Gaps = 8/90 (8%)
Query: 22 HFILKIEAFSSLVENDVEKYG----SLEFDAG--GYKWKLVVYPNGNKNENVKDHISVYL 75
FI KI F + V S F GYK L +Y NG+ H+S++
Sbjct: 4 VFIWKISDFPRKRQEAVAGRIPAIFSPAFYTSRYGYKMCLRIYLNGDGTGR-GTHLSLFF 62
Query: 76 AMVDT-SSFGLGWEVYVIFRLFVLDQKKDE 104
++ + L W L +LDQ E
Sbjct: 63 VVMKGPNDALLRWPFNQKVTLMLLDQNNRE 92
