Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4508
Number of amino acids:207
Molecular Weight:21611.87 Da
Theoretical pI:5.83


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)178.21%
Cysteine CYS (C)31.45%
Glutamic Acid GLU (E)20.97%
Aspartic Acid ASP (D)115.31%
Glycine GLY (G)199.18%
Phynylalanine PHE (F)167.73%
Isoleucine ILE (I)73.38%
Histidine HIS (H)31.45%
Lysine LYS (K)83.86%
Methionine MET (M)31.45%
Leucine LEU (L)3114.98%
Asparagine ASN (N)115.31%
Glutamine GLN (Q)62.9%
Proline PRO (P)136.28%
Serine SER (S)199.18%
Arginine ARG (R)31.45%
Threonine THR (T)209.66%
Tryptophan TRP (W)00%
Valine VAL (V)146.76%
Tyrosine TYR (Y)10.48%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC978
HydrogenH1545
NitrogenN247
OxygenO291
SulphurS6

FormulaC978H1545N247O291S6
Total Number of Atoms:3067


Total number of positively charged residues (ARG + LYS):11
Total number of negatively charged residues (ASP + GLU):13
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    1615
Absorption 0.1% (=1 g/l)    0.075,   assuming all pairs of CYS residues form cystines

Ext. coefficient    1490
Absorption 0.1% (=1 g/l)    0.069,   assuming all CYS residues are reduced
Aromaticity:0.082

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 25.36

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.33, 29.95, 25.60]

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:99.4201
Grand average of hydropathicity (GRAVY):0.38