scholarly journals Studies on the subunit structure and amino acid sequence of triose phosphate isomerase from chicken breast muscle

1974 ◽  
Vol 139 (1) ◽  
pp. 11-22 ◽  
Author(s):  
Anna J. Furth ◽  
J. D. Milman ◽  
J. D. Priddle ◽  
R. E. Offord
Keyword(s):  
Amino Acid ◽  
Amino Acid Sequence ◽  
Triose Phosphate Isomerase ◽  
Breast Muscle ◽  
Chicken Breast ◽  
Rabbit Muscle ◽  
Tryptic Peptides ◽  
Amino Acid Compositions ◽  
Triose Phosphate

1. Triose phosphate isomerase was prepared by chromatography on DEAE-cellulose of an (NH4)2SO4 fraction of an extract of homogenized chicken breast muscle. The product is homogeneous on gel electrophoresis and is suitable for growing crystals for X-ray work. The specific activity is 10000 units/mg and the value for E0.1%280 is 1.20. 2. Comparison between the sum of the amino acid compositions of the tryptic peptides of the protein and the amino acid composition obtained on total hydrolysis of the protein indicates that the relative subunit mass is about 27000. 3. These data, together with the results of the examination of the amino acid compositions of a number of minor peptides, the number of peptides in the tryptic digest and the complete amino acid sequences of the tryptic peptides (the determination of which is described here), give no indication that the subunits are dissimilar. 4. A tentative amino acid sequence is presented for the protein, in which the ordering of the tryptic peptides is derived by homology with the sequence of the rabbit muscle enzyme (Corran & Waley, 1973). 5. An appendix describes the use that was made of mass spectrometry in the determination of some of the sequences. Mass-spectrometric data have been obtained for 35 residues, that is about 15% of the total sequence of the protein. 6. An extended version of the present paper has been deposited as Supplementary Publication SUP 50025 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 Triose phosphate isomerase from the coelacanth. An approach to the rapid determination of an amino acid sequence with small amounts of material

1974 ◽  
Vol 137 (2) ◽  
pp. 185-197 ◽  
Author(s):  
Edith Kolb ◽  
J. Ieuan Harris ◽  
John Bridgen
Keyword(s):  
Amino Acid ◽  
Amino Acid Sequence ◽  
Rapid Determination ◽  
Triose Phosphate Isomerase ◽  
Intact Protein ◽  
Sequence Information ◽  
Rabbit Muscle ◽  
Muscle Enzyme ◽  
Triose Phosphate

The preparation and purification of cyanogen bromide fragments from [14C]carboxymethylated coelacanth triose phosphate isomerase is presented. The automated sequencing of these fragments, the lysine-blocked tryptic peptides derived from them, and also of the intact protein, is described. Combination with results from manual sequence analysis has given the 247-residue amino acid sequence of coelacanth triose phosphate isomerase in 4 months, by using 100mg of enzyme. (Two small adjacent peptides were placed by homology with the rabbit enzyme.) Comparison of this sequence with that of the rabbit muscle enzyme shows that 207 (84%) of the residues are identical. This slow rate of evolutionary change (corresponding to two amino acid substitutions per 100 residues per 100 million years) is similar to that found for glyceraldehyde 3-phosphate dehydrogenase. The reliability of sequence information obtained by automated methods is discussed.

scholarly journals The amino acid sequence of rabbit muscle triose phosphate isomerase

1975 ◽  
Vol 145 (2) ◽  
pp. 335-344 ◽  
Author(s):  
P H Corran ◽  
S G Waley
Keyword(s):  
Amino Acid ◽  
Amino Acid Sequence ◽  
Triose Phosphate Isomerase ◽  
British Library ◽  
Rabbit Muscle ◽  
Amino Acid Residues ◽  
Thiol Groups ◽  
Muscle Enzyme ◽  
Triose Phosphate ◽  
Lending Library

The amino acid sequence of rabbit muscle triose phosphate isomerase was deduced by characterizing peptides that overlap the tryptic peptides. Thiol groups were modified by oxidation, carboxymethylation or aminoen. About 50 peptides that provided information about overlaps were isolated; the peptides were mostly characterized by their compositions and N-terminal residues. The peptide chains contain 248 amino acid residues, and no evidence for dissimilarity of the two subunits that comprise the native enzyme was found. The sequence of the rabbit muscle enzyme may be compared with that of the coelacanth enzyme (Kolb et al., 1974): 84% of the residues are in identical positions. Similarly, comparison of the sequence with that inferred for the chicken enzyme (Furth et al., 1974) shows that 87% of the residues are in identical positions. Limited though these comparisons are, they suggest that triose phosphate isomerase has one of the lowest rates of evolutionary change. An extended version of the present paper has been deposited as Supplementary Publication SUP 50040 (42 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 given in Biochem. J. (1975) 145, 5.

scholarly journals Amino acid sequences around the cysteine residues of rabbit muscle triose phosphate isomerase

1971 ◽  
Vol 122 (2) ◽  
pp. 209-218 ◽  
Author(s):  
Janet C. Miller ◽  
S. G. Waley
Keyword(s):  
Amino Acid ◽  
Cyanogen Bromide ◽  
Triose Phosphate Isomerase ◽  
Amino Acid Sequences ◽  
Cysteine Residues ◽  
Rabbit Muscle ◽  
Amino Acid Residues ◽  
Triose Phosphate ◽  
Methionine Residues ◽  
Polypeptide Chains

1. The nature of the subunits in rabbit muscle triose phosphate isomerase has been investigated. 2. Amino acid analyses show that there are five cysteine residues and two methionine residues/subunit. 3. The amino acid sequences around the cysteine residues have been determined; these account for about 75 residues. 4. Cleavage at the methionine residues with cyanogen bromide gave three fragments. 5. These results show that the subunits correspond to polypeptide chains, containing about 230 amino acid residues. The chains in triose phosphate isomerase seem to be shorter than those of other glycolytic enzymes.

scholarly journals The tryptic peptides of rabbit muscle triose phosphate isomerase

1974 ◽  
Vol 139 (1) ◽  
pp. 1-10 ◽  
Author(s):  
P. H. Corran ◽  
S. G. Waley
Keyword(s):  
Gel Filtration ◽  
Paper Electrophoresis ◽  
Triose Phosphate Isomerase ◽  
British Library ◽  
Rabbit Muscle ◽  
Amino Acid Residues ◽  
Tryptic Peptides ◽  
Triose Phosphate ◽  
Lending Library ◽  
Polypeptide Chains

1. The peptides obtained by tryptic digestion of S-[14C]carboxymethylated rabbit muscle triose phosphate isomerase have been studied. 2. The first step in the fractionation of the tryptic digest was gel filtration on coupled columns of Sephadex G-25 and G-50. Further fractionation was carried out by paper electrophoresis and paper chromatography. 3. The digest contained 26 peptides and three free amino acids. The sizes of the peptides ranged from two to 29 residues. 4. The sequences of the peptides have been determined. 5. The length of the polypeptide chains is about 250 amino acid residues. 6. The variant sequences encountered were due to partial deamidation; this may be one of the reasons for multiple forms of the enzyme. 7. The chicken and rabbit enzymes are compared. 8. Detailed evidence for the sequences of the tryptic peptides has been deposited as Supplementary Publication SUP 50024 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 given in Biochem. J. (1973) 131, 5.

scholarly journals Chymotryptic and tryptic peptides of fragment α1-CB3 from bovine corneal collagen. Pinpointing the sites of hexose attachment

1978 ◽  
Vol 171 (3) ◽  
pp. 697-703 ◽  
Author(s):  
N A Panjwani ◽  
J J Harding
Keyword(s):  
Amino Acid ◽  
Amino Acid Sequence ◽  
Collagen Fibres ◽  
Tryptic Peptides ◽  
Amino Acid Compositions ◽  
Skin Collagen ◽  
Calf Skin ◽  
Corneal Collagen ◽  
Overlap Region

Tryptic peptides of citraconylated fragment alpha1-CB3 and chymotryptic peptides of fragment alpha1-CB3 of bovine corneal collagen were prepared, isolated and characterized. Their amino acid compositions were consistent with the amino acid sequence of fragment alpha1-CB3 from calf skin collagen. Two glycoside sites were identified in bovine corneal fragment alpha1-CB3, one of them being the first located in the overlap region of collagen. The results are related to the uniformly narrow collagen fibres found in cornea and essential for its transparency.

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