Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5966
Number of amino acids:107
Molecular Weight:11879.99 Da
Theoretical pI:8.02


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)65.61%
Cysteine CYS (C)21.87%
Glutamic Acid GLU (E)54.67%
Aspartic Acid ASP (D)43.74%
Glycine GLY (G)65.61%
Phynylalanine PHE (F)54.67%
Isoleucine ILE (I)76.54%
Histidine HIS (H)10.93%
Lysine LYS (K)54.67%
Methionine MET (M)21.87%
Leucine LEU (L)1514.02%
Asparagine ASN (N)65.61%
Glutamine GLN (Q)87.48%
Proline PRO (P)76.54%
Serine SER (S)32.8%
Arginine ARG (R)54.67%
Threonine THR (T)76.54%
Tryptophan TRP (W)10.93%
Valine VAL (V)1211.22%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC537
HydrogenH878
NitrogenN144
OxygenO150
SulphurS4

FormulaC537H878N144O150S4
Total Number of Atoms:1713


Total number of positively charged residues (ARG + LYS):10
Total number of negatively charged residues (ASP + GLU):9
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    5625
Absorption 0.1% (=1 g/l)    0.473,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5500
Absorption 0.1% (=1 g/l)    0.463,   assuming all CYS residues are reduced
Aromaticity:0.056

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]:[37.38, 20.56, 26.17]

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:118.318
Grand average of hydropathicity (GRAVY):0.23