Physicochemical Properties of Peptide



PPepDB ID:PPepDB_582
Number of amino acids:101
Molecular Weight:10612.45 Da
Theoretical pI:7.77


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1211.88%
Cysteine CYS (C)65.94%
Glutamic Acid GLU (E)65.94%
Aspartic Acid ASP (D)21.98%
Glycine GLY (G)54.95%
Phynylalanine PHE (F)43.96%
Isoleucine ILE (I)98.91%
Histidine HIS (H)00%
Lysine LYS (K)98.91%
Methionine MET (M)10.99%
Leucine LEU (L)109.9%
Asparagine ASN (N)76.93%
Glutamine GLN (Q)10.99%
Proline PRO (P)54.95%
Serine SER (S)109.9%
Arginine ARG (R)00%
Threonine THR (T)54.95%
Tryptophan TRP (W)00%
Valine VAL (V)76.93%
Tyrosine TYR (Y)21.98%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC472
HydrogenH772
NitrogenN118
OxygenO143
SulphurS7

FormulaC472H772N118O143S7
Total Number of Atoms:1512


Total number of positively charged residues (ARG + LYS):9
Total number of negatively charged residues (ASP + GLU):8
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    3355
Absorption 0.1% (=1 g/l)    0.316,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.281,   assuming all CYS residues are reduced
Aromaticity:0.059

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 36.27

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.68, 26.73, 28.71]

Amino acids in helix: V, I, Y, F, W, L || Amino acids in turn: N, P, G, S || Amino acids in sheet: E, M, A, L
Aliphatic index:105.347
Grand average of hydropathicity (GRAVY):0.42