scholarly journals Amino acid sequence of the Pronase-released heads of neuraminidase subtype N2 from the Asian strain A/Tokyo/3/67 of influenza virus

1982 ◽  
Vol 207 (1) ◽  
pp. 91-95 ◽  
Author(s):  
C W Ward ◽  
T C Elleman ◽  
A A Azad
Keyword(s):  
Influenza Virus ◽  
Amino Acid ◽  
Amino Acid Sequence ◽  
Sequence Data ◽  
British Library ◽  
Amino Acid Residues ◽  
Asian Strain ◽  
C Terminus ◽  
Glycosylation Sites ◽  
Neuraminidase Subtype

The amino acid sequence of the Pronase-released heads of neuraminidase subtype N2 from the A/Tokyo/3/67 strain of influenza virus was determined by a combination of peptide and nucleic acid sequence analysis. The results show that the Pronase-released heads contain 396 amino acid residues and extend from residue 74 in the original protein to the C-terminus at residue 469. The heads contain five potential glycosylation sites at asparagine residues 86, 146, 200, 234 and 402, but only the first four are glycosylated. The sequence homology with the corresponding region of the previously published sequence of the neuraminidase subtype N1 [Fields, Winter & Brownlee (1981) Nature (London) 290, 213-217] is 45%. Detailed evidence for the sequence data has been deposited as Supplementary Publication SUP 50116 (14 pages) at the British Library Lending Division, Boston Spa, Wetherby, West Yorkshire LS23 7BQ, U.K., from whom copies may be obtained on the terms given in Biochem. J. (1981) 193, 5.

scholarly journals The amino acid sequence of cytochrome c′ from Alcaligenes sp. N.C.I.B. 11015

1973 ◽  
Vol 135 (4) ◽  
pp. 751-758 ◽  
Author(s):  
R. P. Ambler
Keyword(s):  
Amino Acid ◽  
Cytochrome C ◽  
Amino Acid Sequence ◽  
Attachment Site ◽  
Photosynthetic Bacterium ◽  
Chromatium Vinosum ◽  
British Library ◽  
Pseudomonas Denitrificans ◽  
Single Polypeptide Chain ◽  
C Terminus

The amino acid sequence of the cytochrome c′ from Alcaligenes sp. N.C.I.B. 11015 (Iwasaki's ‘Pseudomonas denitrificans’) has been determined. This organism is the only non-photosynthetic bacterium in which the protein has been found. The protein consists of a single polypeptide chain of 127 residues, with a single haem covalently attached to two cysteines. Unlike normal cytochromes c, the haem attachment site is very close to the C-terminus. The amino acid sequence around the haem attachment site is very similar to that of Chromatium vinosum D cytochrome c′. Detailed evidence for the amino acid sequence of the protein has been deposited as Supplementary Publication SUP 50022 at the British Library (Lending Division), (formerly the National Lending Library for Science and Technology), Boston Spa, Yorks. LS23 7BQ, U.K., from whom copies may be obtained on the terms given in Biochem. J. (1973) 131, 5.

scholarly journals The amino acid sequence of ribonuclease U2 from Ustilago sphaerogena

1975 ◽  
Vol 145 (2) ◽  
pp. 353-360 ◽  
Author(s):  
S Sato ◽  
T Uchida
Keyword(s):  
Biological Activity ◽  
Amino Acid ◽  
Amino Acid Sequence ◽  
Crucial Role ◽  
Science And Technology ◽  
British Library ◽  
Amino Acid Residues ◽  
Complete Amino Acid Sequence ◽  
Lending Library

1. RNAase (ribonuclease) U2, a purine-specific RNAase, was reduced, aminoethylated and hydrolysed with trypsin, chymotrypsin and thermolysin. On the basis of the analyses of the resulting peptides, the complete amino acid sequence of RNAase U2 was determined, 2. When the sequence was compared with the amino acid sequence of RNAase T1 (EC 3.1.4.8), the following regions were found to be similar in the two enzymes; Tyr-Pro-His-Gln-Tyr (38-42) in RNAase U2 and Tyr-Pro-His-Lys-Tyr (38-42) in RNAase T1, Glu-Phe-Pro-Leu-Val (61-65) in RNAase U2 and Glu-Trp-Pro-Ile-Leu (58-62) in RNAase T1, Asp-Arg-Val-Ile-Tyr-Gln (83-88) in RNAase U2 and Asp-Arg-Val-Phe-Asn (76-81) in RNAase T1 and Val-Thr-His-Thr-Gly-Ala (98-103) in RNAase U2 and Ile-Thr-His-Thr-Gly-Ala (90-95) in RNAase T1. All of the amino acid residues, histidine-40, glutamate-58, arginine-77 and histidine-92, which were found to play a crucial role in the biological activity of RNAase T1, were included in the regions cited here. 3. Detailed evidence for the amino acid sequence of the sequence of the proteins has been deposited as Supplementary Publication SUP 50041 (33 PAGES) AT THE British Library (Lending Division)(formerly the National Lending Library for Science and Technology), Boston Spa, Yorks. LS23 7BQ, U.K., from whom copies can be obtained on the terms indicated in Biochem. J. (1975), 145, 5.

Amino Acid Sequence Studies of Horseradish Peroxidase. II. Thermolytic Peptides

1972 ◽  
Vol 50 (1) ◽  
pp. 63-90 ◽  
Author(s):  
K. G. Welinder ◽  
L. B. Smillie
Keyword(s):  
Amino Acid ◽  
Horseradish Peroxidase ◽  
Amino Acid Sequence ◽  
Cation Exchanger ◽  
Paper Electrophoresis ◽  
Tryptophan Residue ◽  
Amino Acid Residues ◽  
Disulfide Bridges ◽  
Serine Residue ◽  
C Terminus

Horseradish peroxidase (HRP) was digested with thermolysin. On fractionation on Sephadex G-25, Fine Chromobeads type P (Dowex 50 type resin) and by high-voltage paper electrophoresis, we isolated about 120 thermolytic peptides. Some experimentation on the composition of the pyridine acetate gradient, used for elution of the cation exchanger, is reported. All peptides were characterized with respect to amino acid composition, N-terminal residue, and pH 6.5 mobility. Unknown peptides or peptides not corresponding unambiguously to previously established tryptic sequences were subjected to dansyl-Edman analysis. Thermolytic peptides accounting for all tryptic sequences except a dipeptide and a tripeptide, and unique thermolytic sequences accounting for about 100 amino acid residues, were obtained. Nine convincing and several indicative overlaps were established for known tryptic sequences. The sequences around all four disulfide bridges, the three histidine residues, and the only tryptophan residue have been elucidated. Eight sites of carbohydrate attachment have been identified. For seven of these sites we have evidence for attachment to asparagine, and for six of the sites the carbohydrate-bound asparagine was found in the well-known sequences Asn–X–Ser/Thr. The remaining two sequences, though incomplete, are compatible with this pattern. Tentatively we suggest a pyrrolidone carboxyl N-terminal for HRP. The specificity of trypsin implicates a sequence found in two varieties, differing only by a C-terminal serine residue at the C-terminus of HRP. A discussion of the possible complications of the acidic heme extraction on the results obtained is included.

scholarly journals The amino acid sequence of chymopapain from Carica papaya

1990 ◽  
Vol 266 (1) ◽  
pp. 75-81 ◽  
Author(s):  
D C Watson ◽  
M Yaguchi ◽  
K R Lynn
Keyword(s):  
Amino Acid ◽  
Amino Acid Sequence ◽  
Structural Similarity ◽  
Thiol Group ◽  
Exchange Chromatography ◽  
British Library ◽  
Amino Acid Residues ◽  
Main Paper ◽  
Paper Supplement ◽  
Mild Acid

Chymopapain is a polypeptide of 218 amino acid residues. It has considerable structural similarity with papain and papaya proteinase omega, including conservation of the catalytic site and of the disulphide bonding. Chymopapain is like papaya proteinase omega in carrying four extra residues between papain positions 168 and 169, but differs from both papaya proteinases in the composition of its S2 subsite, as well as in having a second thiol group, Cys-117. Some evidence for the amino acid sequence of chymopapain has been deposited as Supplementary Publication SUP 50153 (12 pages) at the British Library Document Supply Centre, Boston Spa., Wetherby, West Yorkshire LS23 7BQ, U.K., from whom copies may be obtained on the terms indicated in Biochem. J. (1990) 265, 5. The information comprises Supplement Tables 1-4, which contain, in order, amino acid compositions of peptides from tryptic, peptic, CNBr and mild acid cleavages, Supplement Fig. 1, showing re-fractionation of selected peaks from Fig. 2 of the main paper. Supplement Fig. 2, showing cation-exchange chromatography of the earliest-eluted peak of Fig. 3 of the main paper, Supplement Fig. 3, showing reverse-phase h.p.l.c. of the later-eluted peak from Fig. 3 of the main paper, and Supplement Fig. 4, showing the separation of peptides after mild acid hydrolysis of CNBr-cleavage fragment CB3.

scholarly journals The amino acid sequence of troponin I from rabbit skeletal muscle

1975 ◽  
Vol 149 (2) ◽  
pp. 493-496 ◽  
Author(s):  
J M Wilkinson ◽  
R J A. Grand
Keyword(s):  
Skeletal Muscle ◽  
Molecular Weight ◽  
Amino Acid ◽  
Amino Acid Sequence ◽  
Cyanogen Bromide ◽  
Troponin I ◽  
Rabbit Skeletal Muscle ◽  
British Library ◽  
Amino Acid Residues ◽  
N Terminus

The complete amino acid sequence of rabbit skeletal muscle troponin I was determined by the isolation of the cyanogen bromide fragments and the tryptic methionine-containing peptides. Troponin I contains 179 amino acid residues and has a molecular weight of 20864. Its N-terminus is acetylated. Detailed evidence on which the sequence is based has been deposited as Supplementary Publication SUP 50055 (23 pages) at the British Library (Lending Division), Boston Spa, Wetherby, West Yorkshire LS23 7QB, U.K., from whom copies may be obtained on the terms given in Biochem. J. (1975) 145, 5.

scholarly journals The amino acid sequence of protein SCMK-B2C from the high-sulphur fraction of wool keratin

1972 ◽  
Vol 128 (5) ◽  
pp. 1229-1239 ◽  
Author(s):  
T. C. Elleman
Keyword(s):  
Amino Acid ◽  
Amino Acid Sequence ◽  
Wool Fibre ◽  
Amino Acid Residues ◽  
C Terminus ◽  
Unusual Distribution ◽  
Mechanical And Physical Properties ◽  
N Terminus ◽  
Fibre Matrix ◽  
Wool Keratin

1. The amino acid sequence of a protein from the reduced and carboxymethylated high-sulphur fraction of wool has been determined. 2. The sequence of this S-carboxymethylkerateine (SCMK-B2C) of 151 amino acid residues displays much internal homology and an unusual residue distribution. Thus a ten-residue sequence occurs four times near the N-terminus and five times near the C-terminus with few changes. These regions contain much of the molecule's half-cystine, whereas between them there is a region of 19 residues that are mainly small and devoid of cystine and proline. 3. Certain models of the wool fibre based on its mechanical and physical properties propose a matrix of small compact globular units linked together to form beaded chains. The unusual distribution of the component residues of protein SCMK-B2C suggests structures in the wool-fibre matrix compatible with certain features of the proposed models.

scholarly journals Neurotoxins from the venoms of the sea snakes Hydrophis ornatus and Hydrophis lapemoides

1983 ◽  
Vol 213 (1) ◽  
pp. 31-38 ◽  
Author(s):  
N Tamiya ◽  
N Maeda ◽  
H G Cogger
Keyword(s):  
Amino Acid ◽  
Amino Acid Sequence ◽  
Paper Electrophoresis ◽  
Amino Acid Sequences ◽  
British Library ◽  
Amino Acid Residues ◽  
Protein Amino Acid ◽  
Tryptic Peptides ◽  
Sea Snakes ◽  
And Migration

The main neurotoxic components, toxins Hydrophis ornatus a and Hydrophis lapemoides a, were isolated from the venoms of the sea snakes Hydrophis ornatus and Hydrophis lapemoides respectively. The amino acid sequence of toxin Hydrophis ornatus a was deduced to be identical with that of toxin Astrotia stokesii a [Maeda & Tamiya (1978) Biochem. J. 175, 507-517] on the basis of identity of the tryptic peptide ‘map’ and the amino acid composition of each peptide. The amino acid sequence of toxin Hydrophis lapemoides a was determined mainly on the basis of identity of the amino acid compositions, mobilities on paper electrophoresis and migration positions on paper chromatography of the tryptic peptides with those of other sea-snake toxins whose sequences are known. Both toxins Hydrophis ornatus a and Hydrophis lapemoides a consisted of 60 amino acid residues and there were six amino acid replacements between them. The taxonomy of sea snakes in the Hydrophis ornatus complex has long been confused, and the above snakes were originally assigned to taxa that proved to be inconsistent with the relationships indicated by the neurotoxin amino acid sequences obtained. A subsequent re-examination of the specimens revealed an error in the original identifications and demonstrated the value of the protein amino acid sequences in systematic and phylogenetic studies. The isolation procedure and results of amino acid analysis of the tryptic peptides have been deposited as Supplementary Publication SUP 50121 (8 pages) with the British Library Lending Division, Boston Spa, Wetherby, West Yorkshire LS23 7BQ, U.K., from whom copies may be obtained as indicated in Biochem. J. (1983) 209, 5.

Amino acid sequence of penicillopepsin. IV. Myxobacter AL-1 protease II and Staphylococcus aureus protease fragments and homology with pig pepsin and chymosin

1976 ◽  
Vol 54 (10) ◽  
pp. 902-914 ◽  
Author(s):  
Anne Cunningham ◽  
Hsin-Min Wang ◽  
Stephen R. Jones ◽  
Alexander Kurosky ◽  
Leticia Rao ◽  
...  
Keyword(s):  
Amino Acids ◽  
Staphylococcus Aureus ◽  
Amino Acid ◽  
Amino Acid Sequence ◽  
Sequence Data ◽  
Amino Acid Residues ◽  
Terminal Sequence ◽  
Fungal Enzyme ◽  
Fungal Protease ◽  
And Staphylococcus Aureus

The digest of penicillopepsin (EC 3.4.23.7) with protease II from Myxobacter AL-1 gave five fragments which were separated on a Biogel P-100 column in 70% formic acid. The fragments were from 16 to 125 amino acids long. Two fragments were also isolated from a digest with a protease from Staphylococcus aureus. The analysis of these fragments by automatic sequencer gave a number of overlaps of the chymotryptic and thermolytic peptides. The available amino acid sequence data for penicillopepsin described in this paper and the accompanying papers (Kurosky, A. &Hofmann, T.: Can. J. Biochem. 54, 872 (1976); Rao, L. &Hofmann, T.: Can. J. Biochem. 54, 885 (1976); Harris, C. I., Rao, L., Shutsa, P., Kurosky, A. &Hofmann, T.: Can. J. Biochem. 54, 895 (1976)) have been combined and yield 15 fragments which range in lengths from 3 to 112 amino acid residues. These unique fragments account for virtually all the amino acids of the fungal protease. Four of the fragments with a total of 194 residues (about 60% of the molecule) have been aligned with corresponding sections of pig pepsin (EC 3.4.23.1) and with part of the N-terminal sequence available for calf chymosin (EC 3.4.23.4). In the alignments about 37% of the residues in the fungal enzyme are identical with at least one of the mammalian enzymes. An additional 20% are chemically similar. These results, together with previously reported active-site directed modifications, show conclusively that penicillopepsin is an evolutionary homologue of the mammalian acid proteases.

scholarly journals The amino acid sequence of a carbohydrate-containing immunoglobulin-light-chain-type amyloid-fibril protein

1985 ◽  
Vol 232 (1) ◽  
pp. 183-190 ◽  
Author(s):  
T Tveteraas ◽  
K Sletten ◽  
P Westermark
Keyword(s):  
Amino Acid ◽  
Amino Acid Sequence ◽  
Light Chain ◽  
Amyloid Fibrils ◽  
Amyloid Fibril ◽  
Amino Acid Residues ◽  
Hypervariable Regions ◽  
Glycosylation Sites ◽  
Amyloid Fibril Protein ◽  
Chain Type

The amino acid sequence of an amyloid-fibril protein Es492 of immunoglobulin-lambda-light-chain origin (AL) was elucidated. The amyloid fibrils were obtained from the spleen of a patient who died from systemic amyloidosis. The amino acid sequence was elucidated from structural studies of peptides derived from digestion of the protein with trypsin, thermolysin, chymotrypsin and Staphylococcus aureus V8 proteinase and from cleavage of the protein with CNBr and BNPS-skatole. A heterogeneity in the length of the polypeptide was seen in the C-terminal region. The protein was by sequence homology to other lambda-chains shown to be of the V lambda II subgroup. Although an extensive homology was seen, some amino acid residues in positions 26, 31, 32, 40, 44, 93, 97, 98 and 99 have not previously been reported in these positions of V lambda II proteins. The significance of these residues in the fibril formation is unclear. The protein was found to contain carbohydrate, with glycosylation sites in two of the hypervariable regions.

scholarly journals Complete amino acid sequences of the three collagen-like regions present in subcomponent C1q of the first component of human complement

1979 ◽  
Vol 179 (2) ◽  
pp. 367-371 ◽  
Author(s):  
K B M Reid
Keyword(s):  
Amino Acid ◽  
Amino Acid Sequence ◽  
Sequence Data ◽  
Amino Acid Sequences ◽  
Amino Acid Residues ◽  
Human Complement ◽  
Threonine Residue ◽  
A Chain

The sequences of amino acid residues 38–51 of the A-chain, and residues 42–90 of the C-chain, of human subcomponent C1q are given. These results, along with previously published sequence data [Reid (1974) Biochem.J. 141, 189–203; Reid (1977) Biochem.J. 161, 247–251; Reid & Thompson (1978) Biochem.J. 173, 863–868] allow the presentation, and comparison with each other, of the complete amino acid sequences of the collagen-like regions found in the A-, B- and C-chains of human subcomponent C1q. Each chain has the continuity of its collagen-like Gly-X-Y repeating triplet amino acid sequence broken. The B- and C-chains have alanine residues at positions B-9 and C-36 where glycine might be expected. The A-chain has a threonine residue at position A-39, which is located between two Gly-X-Y triplets.

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