Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5147
Number of amino acids:222
Molecular Weight:23913.39 Da
Theoretical pI:6.32


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)188.11%
Cysteine CYS (C)20.9%
Glutamic Acid GLU (E)52.25%
Aspartic Acid ASP (D)135.86%
Glycine GLY (G)167.21%
Phynylalanine PHE (F)167.21%
Isoleucine ILE (I)156.76%
Histidine HIS (H)31.35%
Lysine LYS (K)135.86%
Methionine MET (M)20.9%
Leucine LEU (L)198.56%
Asparagine ASN (N)198.56%
Glutamine GLN (Q)104.5%
Proline PRO (P)146.31%
Serine SER (S)135.86%
Arginine ARG (R)41.8%
Threonine THR (T)135.86%
Tryptophan TRP (W)00%
Valine VAL (V)2310.36%
Tyrosine TYR (Y)41.8%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1085
HydrogenH1702
NitrogenN282
OxygenO318
SulphurS4

FormulaC1085H1702N282O318S4
Total Number of Atoms:3391


Total number of positively charged residues (ARG + LYS):17
Total number of negatively charged residues (ASP + GLU):18
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    6085
Absorption 0.1% (=1 g/l)    0.254,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5960
Absorption 0.1% (=1 g/l)    0.249,   assuming all CYS residues are reduced
Aromaticity:0.090

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 21.16

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[34.68, 27.93, 19.82]

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:97.883
Grand average of hydropathicity (GRAVY):0.12