Score = 92.0 bits (227), Expect = 1e-18, Method: Composition-based stats.
Identities = 46/89 (51%), Positives = 62/89 (69%), Gaps = 3/89 (3%)
Query: 5 GEPIIVFRPDVTTPLEEHETYRGNLSAYDETKVWTADKCVPLVREITFENAEELTEEGLP 64
G+ +I P + P Y G+++ +D T W DKCVPLVREITFEN EELTEEGLP
Sbjct: 206 GDNVIYKPPGRSAP---DMVYLGSMTNFDVTYNWIQDKCVPLVREITFENGEELTEEGLP 262
Query: 65 FLILFYAPGDTETIKLFKSIVSEQLLGEK 93
FLILF+ DTE++++F++ V+ QL+ EK
Sbjct: 263 FLILFHMKDDTESLEIFQNEVARQLISEK 291
Mediates thiol-dependent retention in the early secretory pathway, forming mixed disulfides with substrate proteins through its conserved CRFS motif. Inhibits the calcium channel activity of ITPR1. May have a role in the control of oxidative protein folding in the endoplasmic reticulum. Required to retain ERO1L and ERO1LB in the endoplasmic reticulum. Mus musculus (taxid: 10090)
Mediates thiol-dependent retention in the early secretory pathway, forming mixed disulfides with substrate proteins through its conserved CRFS motif. Inhibits the calcium channel activity of ITPR1. May have a role in the control of oxidative protein folding in the endoplasmic reticulum. Required to retain ERO1L and ERO1LB in the endoplasmic reticulum.
Score = 91.3 bits (225), Expect = 1e-18, Method: Compositional matrix adjust.
Identities = 47/89 (52%), Positives = 61/89 (68%), Gaps = 3/89 (3%)
Query: 5 GEPIIVFRPDVTTPLEEHETYRGNLSAYDETKVWTADKCVPLVREITFENAEELTEEGLP 64
G+ II P + P Y G ++ +D T W DKCVPLVREITFEN EELTEEGLP
Sbjct: 206 GDNIIYKPPGHSAP---DMVYLGAMTNFDVTYNWIQDKCVPLVREITFENGEELTEEGLP 262
Query: 65 FLILFYAPGDTETIKLFKSIVSEQLLGEK 93
FLILF+ DTE++++F++ V+ QL+ EK
Sbjct: 263 FLILFHMKEDTESLEIFQNEVARQLISEK 291
Mediates thiol-dependent retention in the early secretory pathway, forming mixed disulfides with substrate proteins through its conserved CRFS motif. Inhibits the calcium channel activity of ITPR1. May have a role in the control of oxidative protein folding in the endoplasmic reticulum. Required to retain ERO1L and ERO1LB in the endoplasmic reticulum.
Homo sapiens (taxid: 9606)
>sp|Q17688|TXNDL_CAEEL Thioredoxin domain-containing protein C06A6.5 OS=Caenorhabditis elegans GN=C06A6.5 PE=1 SV=2
>gnl|CDD|239370 cd03072, PDI_b'_ERp44, PDIb' family, ERp44 subfamily, second redox inactive TRX-like domain b'; ERp44 is an endoplasmic reticulum (ER)-resident protein, induced during stress, involved in thiol-mediated ER retention
It contains an N-terminal TRX domain with a CXFS motif followed by two redox inactive TRX-like domains, homologous to the b and b' domains of PDI. Through the formation of reversible mixed disulfides, ERp44 mediates the ER localization of Ero1alpha, a protein that oxidizes protein disulfide isomerases into their active form. ERp44 also prevents the secretion of unassembled cargo protein with unpaired cysteines. ERp44 also modulates the activity of inositol 1,4,5-triphosphate type I receptor (IP3R1), an intracellular channel protein that mediates calcium release from the ER to the cytosol. Similar to PDI, the b' domain of ERp44 is likely involved in substrate recognition and may be the primary binding site. Length = 111
Score = 62.7 bits (153), Expect = 8e-14
Identities = 30/94 (31%), Positives = 42/94 (44%), Gaps = 7/94 (7%)
Query: 1 MHPPGEPIIVFRPDVTTPLEEHETYRGNLSA-YDETKVWTADKCVPLVREITFENAEELT 59
I++FR E+ TY G +D+ K + +PLV E T ENAEEL
Sbjct: 37 YGIKEPTILLFRKF----DEKQVTYPGEDKTTFDDLKKFIQKNSLPLVGEFTPENAEELF 92
Query: 60 EEGLPFLILFYAPGDTETIKLFKSIVSEQLLGEK 93
E G P +L + D+E + K+ V E K
Sbjct: 93 ESGKP--LLLFIKKDSEETEKLKNRVEEVAKKFK 124
Length = 183
>gnl|CDD|239368 cd03070, PDI_b_ERp44, PDIb family, ERp44 subfamily, first redox inactive TRX-like domain b; ERp44 is an endoplasmic reticulum (ER)-resident protein, induced during stress, involved in thiol-mediated ER retention
Score = 35.0 bits (81), Expect = 7e-04
Identities = 12/36 (33%), Positives = 16/36 (44%), Gaps = 3/36 (8%)
Query: 1 MHPPGEPIIVFRPDVTTPLEEHETYRGNLSAYDETK 36
PPG+ II F P Y G+L+ +D K
Sbjct: 59 ERPPGDNIIYFPPGHN---APDMVYLGSLTNFDLLK 91
It contains an N-terminal TRX domain with a CXFS motif followed by two redox inactive TRX-like domains, homologous to the b and b' domains of PDI. Through the formation of reversible mixed disulfides, ERp44 mediates the ER localization of Ero1alpha, a protein that oxidizes protein disulfide isomerases into their active form. ERp44 also prevents the secretion of unassembled cargo protein with unpaired cysteines. ERp44 also modulates the activity of inositol 1,4,5-triphosphate type I receptor (IP3R1), an intracellular channel protein that mediates calcium release from the ER to the cytosol. Similar to PDI, the b domain of ERp44 is likely involved in binding to substrates. Length = 91
>cd03072 PDI_b'_ERp44 PDIb' family, ERp44 subfamily, second redox inactive TRX-like domain b'; ERp44 is an endoplasmic reticulum (ER)-resident protein, induced during stress, involved in thiol-mediated ER retention
It contains an N-terminal TRX domain with a CXFS motif followed by two redox inactive TRX-like domains, homologous to the b and b' domains of PDI. Through the formation of reversible mixed disulfides, ERp44 mediates the ER localization of Ero1alpha, a protein that oxidizes protein disulfide isomerases into their active form. ERp44 also prevents the secretion of unassembled cargo protein with unpaired cysteines. ERp44 also modulates the activity of inositol 1,4,5-triphosphate type I receptor (IP3R1), an intracellular channel protein that mediates calcium release from the ER to the cytosol. Similar to PDI, the b' domain of ERp44 is likely involved in substrate recognition and may be the primary binding site.
Members of this family have at least two protein-disulfide domains, each similar to thioredoxin but with the redox-active disulfide in the motif PWCGHCK, and an ER retention signal at the extreme C-terminus (KDEL, HDEL, and similar motifs).
>cd03070 PDI_b_ERp44 PDIb family, ERp44 subfamily, first redox inactive TRX-like domain b; ERp44 is an endoplasmic reticulum (ER)-resident protein, induced during stress, involved in thiol-mediated ER retention
It contains an N-terminal TRX domain with a CXFS motif followed by two redox inactive TRX-like domains, homologous to the b and b' domains of PDI. Through the formation of reversible mixed disulfides, ERp44 mediates the ER localization of Ero1alpha, a protein that oxidizes protein disulfide isomerases into their active form. ERp44 also prevents the secretion of unassembled cargo protein with unpaired cysteines. ERp44 also modulates the activity of inositol 1,4,5-triphosphate type I receptor (IP3R1), an intracellular channel protein that mediates calcium release from the ER to the cytosol. Similar to PDI, the b domain of ERp44 is likely involved in binding to substrates.
>cd03069 PDI_b_ERp57 PDIb family, ERp57 subfamily, first redox inactive TRX-like domain b; ERp57 (or ERp60) exhibits both disulfide oxidase and reductase functions like PDI, by catalyzing the formation of disulfide bonds of newly synthesized polypeptides in the ER and acting as isomerases to correct any non-native disulfide bonds
It also displays chaperone activity to prevent protein aggregation and facilitate the folding of newly synthesized proteins. ERp57 contains two redox-active TRX (a) domains and two redox inactive TRX-like (b) domains. It shares the same domain arrangement of abb'a' as PDI, but lacks the C-terminal acid-rich region (c domain) that is present in PDI. ERp57 interacts with the lectin chaperones, calnexin and calreticulin, and specifically promotes the oxidative folding of glycoproteins. Similar to PDI, the b domain of ERp57 is likely involved in binding to substrates.
>TIGR01130 ER_PDI_fam protein disulfide isomerases, eukaryotic
Probab=95.35 E-value=0.1 Score=40.79 Aligned_cols=75 Identities=21% Similarity=0.315 Sum_probs=56.9
Q ss_pred eEEecCCCCCCCCcceeeecCCCCHHHHHHhhhhccccceeeee-ccchhhhhhcCCceEEEeeCCCChhHHHHHHHHHH
Q psy5544 8 IIVFRPDVTTPLEEHETYRGNLSAYDETKVWTADKCVPLVREIT-FENAEELTEEGLPFLILFYAPGDTETIKLFKSIVS 86 (96)
Q Consensus 8 ~i~Fr~~~~~~~~~~~~f~G~~sn~~~l~~W~~~kCvPLVREIT-FeNaEELtEEgLPfLILF~~pdD~~s~k~F~~~V~ 86 (96)
+++|+..... -..|.|.. +.+.+.+|+.+.--|-+.+|+ .++.+++.+..-+.+|+|....|....+.|.++..
T Consensus 79 ~~~~~~g~~~----~~~~~g~~-~~~~l~~~i~~~~~~~~~~i~~~~~~~~~~~~~~~~vi~~~~~~~~~~~~~~~~~a~ 153 (462)
T TIGR01130 79 LKIFRNGEDS----VSDYNGPR-DADGIVKYMKKQSGPAVKEIETVADLEAFLADDDVVVIGFFKDLDSELNDTFLSVAE 153 (462)
T ss_pred EEEEeCCccc----eeEecCCC-CHHHHHHHHHHhcCCCceeecCHHHHHHHHhcCCcEEEEEECCCCcHHHHHHHHHHH
Confidence 5677754321 26788986 679999999999999999996 88888877777777888777666677788877654
Q ss_pred H
Q psy5544 87 E 87 (96)
Q Consensus 87 ~ 87 (96)
.
T Consensus 154 ~ 154 (462)
T TIGR01130 154 K 154 (462)
T ss_pred H
Confidence 3
Members of this family have at least two protein-disulfide domains, each similar to thioredoxin but with the redox-active disulfide in the motif PWCGHCK, and an ER retention signal at the extreme C-terminus (KDEL, HDEL, and similar motifs).
>cd02981 PDI_b_family Protein Disulfide Isomerase (PDIb) family, redox inactive TRX-like domain b; composed of eukaryotic proteins involved in oxidative protein folding in the endoplasmic reticulum (ER) by acting as catalysts and folding assistants
Members of this family include PDI, calsequestrin and other PDI-related proteins like ERp72, ERp57, ERp44 and PDIR. PDI, ERp57 (or ERp60), ERp72 and PDIR are all oxidases, catalyzing the formation of disulfide bonds of newly synthesized polypeptides in the ER. They also exhibit reductase activity in acting as isomerases to correct any non-native disulfide bonds, as well as chaperone activity to prevent protein aggregation and facilitate the folding of newly synthesized proteins. These proteins contain multiple copies of a redox active TRX (a) domain containing a CXXC motif, and one or more redox inactive TRX-like (b) domains. The molecular structure of PDI is abb'a'. Also included in this family is the PDI-related protein ERp27, which contai
>cd02996 PDI_a_ERp44 PDIa family, endoplasmic reticulum protein 44 (ERp44) subfamily; ERp44 is an ER-resident protein, induced during stress, involved in thiol-mediated ER retention
It contains an N-terminal TRX domain, similar to that of PDIa, with a CXFS motif followed by two redox inactive TRX-like domains, homologous to the b and b' domains of PDI. The CXFS motif in the N-terminal domain allows ERp44 to form stable reversible mixed disulfides with its substrates. Through this activity, ERp44 mediates the ER localization of Ero1alpha, a protein that oxidizes protein disulfide isomerases into their active form. ERp44 also prevents the secretion of unassembled cargo protein with unpaired cysteines. It also modulates the activity of inositol 1,4,5-triphosphate type I receptor (IP3R1), an intracellular channel protein that mediates calcium release from the ER to the cytosol.
>cd02982 PDI_b'_family Protein Disulfide Isomerase (PDIb') family, redox inactive TRX-like domain b'; composed of eukaryotic proteins involved in oxidative protein folding in the endoplasmic reticulum (ER) by acting as catalysts and folding assistants
Members of this family include PDI, calsequestrin and other PDI-related proteins like ERp72, ERp57 (or ERp60), ERp44, P5 and PDIR. PDI, ERp57, ERp72, P5 and PDIR are all oxidases, catalyzing the formation of disulfide bonds of newly synthesized polypeptides in the ER. They also exhibit reductase activity in acting as isomerases to correct any non-native disulfide bonds, as well as chaperone activity to prevent protein aggregation and facilitate the folding of newly synthesized proteins. These proteins contain multiple copies of a redox active TRX (a) domain containing a CXXC motif, and one or more redox inactive TRX-like (b) domains. The molecular structure of PDI is abb'a'. Also included in this family is the PDI-related protein ERp27, w
>cd03068 PDI_b_ERp72 PDIb family, ERp72 subfamily, first redox inactive TRX-like domain b; ERp72 exhibits both disulfide oxidase and reductase functions like PDI, by catalyzing the formation of disulfide bonds of newly synthesized polypeptides in the ER and acting as isomerases to correct any non-native disulfide bonds
It also displays chaperone activity to prevent protein aggregation and facilitate the folding of newly synthesized proteins. ERp72 contains three redox-active TRX (a) domains and two redox inactive TRX-like (b) domains. Its molecular structure is a"abb'a', compared to the abb'a' structure of PDI. ERp72 associates with several ER chaperones and folding factors to form complexes in the ER that bind nascent proteins. Similar to PDI, the b domain of ERp72 is likely involved in binding to substrates.
>cd02997 PDI_a_PDIR PDIa family, PDIR subfamily; composed of proteins similar to human PDIR (for Protein Disulfide Isomerase Related)
PDIR is composed of three redox active TRX (a) domains and an N-terminal redox inactive TRX-like (b) domain. Similar to PDI, it is involved in oxidative protein folding in the endoplasmic reticulum (ER) through its isomerase and chaperone activities. These activities are lower compared to PDI, probably due to PDIR acting only on a subset of proteins. PDIR is preferentially expressed in cells actively secreting proteins and its expression is induced by stress. Similar to PDI, the isomerase and chaperone activities of PDIR are independent; CXXC mutants lacking isomerase activity retain chaperone activity.
>cd02995 PDI_a_PDI_a'_C PDIa family, C-terminal TRX domain (a') subfamily; composed of the C-terminal redox active a' domains of PDI, ERp72, ERp57 (or ERp60) and EFP1
PDI, ERp72 and ERp57 are endoplasmic reticulum (ER)-resident eukaryotic proteins involved in oxidative protein folding. They are oxidases, catalyzing the formation of disulfide bonds of newly synthesized polypeptides in the ER. They also exhibit reductase activity in acting as isomerases to correct any non-native disulfide bonds, as well as chaperone activity to prevent protein aggregation and facilitate the folding of newly synthesized proteins. PDI and ERp57 have the abb'a' domain structure (where a and a' are redox active TRX domains while b and b' are redox inactive TRX-like domains). PDI also contains an acidic region (c domain) after the a' domain that is absent in ERp57. ERp72 has an additional a domain at the N-terminus (a"abb'a' domain structure). ERp57 interacts with the lectin chaperones, calnexin and calreticu
>cd03003 PDI_a_ERdj5_N PDIa family, N-terminal ERdj5 subfamily; ERdj5, also known as JPDI and macrothioredoxin, is a protein containing an N-terminal DnaJ domain and four redox active TRX domains
This subfamily is comprised of the first TRX domain of ERdj5 located after the DnaJ domain at the N-terminal half of the protein. ERdj5 is a ubiquitous protein localized in the endoplasmic reticulum (ER) and is abundant in secretory cells. It's transcription is induced during ER stress. It interacts with BiP through its DnaJ domain in an ATP-dependent manner. BiP, an ER-resident member of the Hsp70 chaperone family, functions in ER-associated degradation and protein translocation.
