Score = 74.3 bits (181), Expect = 2e-13, Method: Compositional matrix adjust.
Identities = 38/67 (56%), Positives = 43/67 (64%)
Query: 4 ECKGKSSWPELVGVEGKVAAETIERENPIVSAHILLEGSIVFLDRYCRRVYVWVDTNGIV 63
C GKSSWP LVGV G VA IER+NP V A IL EG+ V D C RV +WV+ G+V
Sbjct: 2 SCPGKSSWPHLVGVGGSVAKAIIERQNPNVKAVILEEGTPVTKDFRCNRVRIWVNKRGLV 61
Query: 64 VDVPTIG 70
V P IG
Sbjct: 62 VSPPRIG 68
Specifically inhibits both trypsin and activated Hageman factor. Cucurbita maxima (taxid: 3661)
Score = 69.3 bits (168), Expect = 7e-12, Method: Compositional matrix adjust.
Identities = 36/67 (53%), Positives = 40/67 (59%)
Query: 4 ECKGKSSWPELVGVEGKVAAETIERENPIVSAHILLEGSIVFLDRYCRRVYVWVDTNGIV 63
+C+GK SWP+LVG G A IERENP V A I+ GS V D C RV VWV GIV
Sbjct: 2 QCQGKRSWPQLVGSTGAAAKAVIERENPRVRAVIVRVGSPVTADFRCDRVRVWVTERGIV 61
Query: 64 VDVPTIG 70
P IG
Sbjct: 62 ARPPAIG 68
Competitively inhibits Glu S.griseus protease by forming probably a 1:1 complex. BGIA has no inhibitory activity against 2 other acidic amino acid-specific endopeptidases (S.aureus protease V8 and B.subtilis proteinase), chymotrypsin, trypsin, pancreatic elastase, and papain, although subtilisin Carlsberg was strongly inhibited.
Score = 60.1 bits (144), Expect = 4e-09, Method: Compositional matrix adjust.
Identities = 32/70 (45%), Positives = 41/70 (58%)
Query: 1 MDFECKGKSSWPELVGVEGKVAAETIERENPIVSAHILLEGSIVFLDRYCRRVYVWVDTN 60
M +C K+SWPELVG G +AA I+ EN V A ++ EG + D RV V+VD N
Sbjct: 1 MASQCPVKNSWPELVGTNGDIAAGIIQTENANVKAIVVKEGLPITQDLNFNRVRVFVDEN 60
Query: 61 GIVVDVPTIG 70
+V VP IG
Sbjct: 61 RVVTQVPAIG 70
Inhibitor of serine proteases, strongly inhibits subtilisin A and weakly inhibits trypsin. Does not inhibit chymotrypsin, papain, pepsin, pronase E, protease type XIII and thermolysin. HPI-1 inhibits subtilisin A with an Ki of 0.21 nM. HPI-2a inhibits subtilisin A with an Ki of 0.08 nM. HPI-2b inhibits subtilisin A with an Ki of 0.1 nM.
>gi|407260769|gb|AFT92003.1| potato inhibitor I family protein [Populus tomentosa] gi|407260793|gb|AFT92015.1| potato inhibitor I family protein [Populus tomentosa]
>gi|357441047|ref|XP_003590801.1| Inhibitor of trypsin and hageman factor [Medicago truncatula] gi|355479849|gb|AES61052.1| Inhibitor of trypsin and hageman factor [Medicago truncatula]
Source: Vitis cinerea var. helleri x Vitis riparia
Species: Vitis cinerea var. helleri x Vitis riparia
Genus: Vitis
Family: Vitaceae
Order: Vitales
Class:
Phylum: Streptophyta
Superkingdom: Eukaryota
>gi|407260771|gb|AFT92004.1| potato inhibitor I family protein [Populus alba x Populus tremula var. glandulosa] gi|407260795|gb|AFT92016.1| potato inhibitor I family protein [Populus alba x Populus tremula var. glandulosa]
Score = 177 (67.4 bits), Expect = 1.3e-13, P = 1.3e-13
Identities = 38/70 (54%), Positives = 44/70 (62%)
Query: 1 MDFECKGKSSWPELVGVEGKVAAETIERENPIVSAHILLEGSIVFLDRYCRRVYVWVDTN 60
M EC K+SWPEL G G AA IERENP V+A ++L+GS V D C RV V+VD N
Sbjct: 1 MSTECPRKNSWPELTGTNGDYAAVVIERENPTVNAAVILDGSPVTADFRCDRVRVFVDGN 60
Query: 61 GIVVDVPTIG 70
IVV P G
Sbjct: 61 RIVVKTPKSG 70
Score = 93 (37.8 bits), Expect = 0.00010, P = 0.00010
Identities = 27/67 (40%), Positives = 32/67 (47%)
Query: 8 KSSWPELVGVEGKVAAETIERENPIVSAHILLEGSIVFLDRYCRRVYVWVDTN----GIV 63
K WPEL GV+G A IE +NP V I+ + V C RV V V N G V
Sbjct: 30 KVDWPELNGVKGLEAKRIIEHDNPKVVVVIIPDDVAVLAVNCCNRVIVRVPVNNCPNGPV 89
Query: 64 VDVPTIG 70
+ P IG
Sbjct: 90 SNFPHIG 96
Inhibitor_I78: Peptidase inhibitor I78 family; Int
99.72
>PF00280 potato_inhibit: Potato inhibitor I family; InterPro: IPR000864 Peptide proteinase inhibitors can be found as single domain proteins or as single or multiple domains within proteins; these are referred to as either simple or compound inhibitors, respectively
In many cases they are synthesised as part of a larger precursor protein, either as a prepropeptide or as an N-terminal domain associated with an inactive peptidase or zymogen. This domain prevents access of the substrate to the active site. Removal of the N-terminal inhibitor domain either by interaction with a second peptidase or by autocatalytic cleavage activates the zymogen. Other inhibitors interact direct with proteinases using a simple noncovalent lock and key mechanism; while yet others use a conformational change-based trapping mechanism that depends on their structural and thermodynamic properties. This family of proteinase inhibitors belong to MEROPS inhibitor family I13, clan IG. They inhibit peptidases of the S1 (IPR001254 from INTERPRO) and S8 (IPR000209 from INTERPRO) families []. Potato inhibitor type I sequences are not solely restricted to potatoes but are found in other plant species for example: barley endosperm chymotrypsin inhibitor [], and pumpkin trypsin inhibitor. Exceptions are found in leech's, e.g.Hirudo medicinalis (Medicinal leech), but not other metazoa []. In general, the proteins have retained a specificity towards chymotrypsin-like and elastase-like proteases []. Structurally these inhibitors are small (60 to 90 residues) and in contrast with other families of protease inhibitors, they lack disulphide bonds. The inhibitor is a wedge-shaped molecule, its pointed edge formed by the protease-binding loop, which contains the scissile bond. The loop binds tightly to the protease active site, subsequent cleavage of the scissile bond causing inhibition of the enzyme []. The inhibitors (designated type I and II) are synthesised in potato tubers, increasing in concentration as the tuber develops. Synthesis of the inhibitors throughout the plant is also induced by leaf damage; this systemic response being triggered by the release of a putative plant hormone []. Examples found in the bacteria and archaea are probable false positives.; GO: 0004867 serine-type endopeptidase inhibitor activity, 0009611 response to wounding; PDB: 1TEC_I 1SBN_I 1ACB_I 1EGP_A 3TEC_I 2SEC_I 1EGL_A 2TEC_I 1SIB_I 1MEE_I ....
>PF11720 Inhibitor_I78: Peptidase inhibitor I78 family; InterPro: IPR021719 This family includes Aspergillus elastase inhibitor and belongs to MEROPS peptidase inhibitor family I78
Score = 74.3 bits (181), Expect = 2e-14, Method: Compositional matrix adjust.
Identities = 38/67 (56%), Positives = 43/67 (64%)
Query: 4 ECKGKSSWPELVGVEGKVAAETIERENPIVSAHILLEGSIVFLDRYCRRVYVWVDTNGIV 63
C GKSSWP LVGV G VA IER+NP V A IL EG+ V D C RV +WV+ G+V
Sbjct: 3 SCPGKSSWPHLVGVGGSVAKAIIERQNPNVKAVILEEGTPVTKDFRCNRVRIWVNKRGLV 62
Query: 64 VDVPTIG 70
V P IG
Sbjct: 63 VSPPRIG 69
Score = 74.3 bits (181), Expect = 2e-14, Method: Compositional matrix adjust.
Identities = 38/67 (56%), Positives = 43/67 (64%)
Query: 4 ECKGKSSWPELVGVEGKVAAETIERENPIVSAHILLEGSIVFLDRYCRRVYVWVDTNGIV 63
C GKSSWP LVGV G VA IER+NP V A IL EG+ V D C RV +WV+ G+V
Sbjct: 3 SCPGKSSWPHLVGVGGSVAKAIIERQNPNVKAVILEEGTPVTKDFRCNRVRIWVNKRGLV 62
Query: 64 VDVPTIG 70
V P IG
Sbjct: 63 VSPPRIG 69
Score = 92.1 bits (229), Expect = 5e-27
Identities = 38/67 (56%), Positives = 43/67 (64%)
Query: 4 ECKGKSSWPELVGVEGKVAAETIERENPIVSAHILLEGSIVFLDRYCRRVYVWVDTNGIV 63
C GKSSWP LVGV G VA IER+NP V A IL EG+ V D C RV +WV+ G+V
Sbjct: 3 SCPGKSSWPHLVGVGGSVAKAIIERQNPNVKAVILEEGTPVTKDFRCNRVRIWVNKRGLV 62
Query: 64 VDVPTIG 70
V P IG
Sbjct: 63 VSPPRIG 69
Score = 72.9 bits (179), Expect = 1e-19
Identities = 26/41 (63%), Positives = 28/41 (68%)
Query: 4 ECKGKSSWPELVGVEGKVAAETIERENPIVSAHILLEGSIV 44
C GKSSWP LVGV G VA IER+NP V A IL EG+ V
Sbjct: 3 SCPGKSSWPHLVGVGGSVAKAIIERQNPNVKAVILEEGTPV 43
class: Alpha and beta proteins (a+b)
fold: CI-2 family of serine protease inhibitors
superfamily: CI-2 family of serine protease inhibitors
family: CI-2 family of serine protease inhibitors
domain: Eglin C
species: Leech (Hirudo medicinalis) [TaxId: 6421]
class: Alpha and beta proteins (a+b)
fold: CI-2 family of serine protease inhibitors
superfamily: CI-2 family of serine protease inhibitors
family: CI-2 family of serine protease inhibitors
domain: Eglin C
species: Leech (Hirudo medicinalis) [TaxId: 6421]
