Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5227
Number of amino acids:222
Molecular Weight:24101.72 Da
Theoretical pI:6.46


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)156.76%
Cysteine CYS (C)31.35%
Glutamic Acid GLU (E)62.7%
Aspartic Acid ASP (D)135.86%
Glycine GLY (G)229.91%
Phynylalanine PHE (F)156.76%
Isoleucine ILE (I)135.86%
Histidine HIS (H)41.8%
Lysine LYS (K)125.41%
Methionine MET (M)20.9%
Leucine LEU (L)229.91%
Asparagine ASN (N)135.86%
Glutamine GLN (Q)52.25%
Proline PRO (P)156.76%
Serine SER (S)114.95%
Arginine ARG (R)62.7%
Threonine THR (T)125.41%
Tryptophan TRP (W)00%
Valine VAL (V)229.91%
Tyrosine TYR (Y)114.95%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1109
HydrogenH1706
NitrogenN278
OxygenO313
SulphurS5

FormulaC1109H1706N278O313S5
Total Number of Atoms:3411


Total number of positively charged residues (ARG + LYS):18
Total number of negatively charged residues (ASP + GLU):19
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    16515
Absorption 0.1% (=1 g/l)    0.685,   assuming all pairs of CYS residues form cystines

Ext. coefficient    16390
Absorption 0.1% (=1 g/l)    0.680,   assuming all CYS residues are reduced
Aromaticity:0.117

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 21.75

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[37.39, 27.48, 20.27]

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:96.982
Grand average of hydropathicity (GRAVY):0.15