Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5373
Number of amino acids:371
Molecular Weight:39336.07 Da
Theoretical pI:5.51


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)6918.6%
Cysteine CYS (C)20.54%
Glutamic Acid GLU (E)236.2%
Aspartic Acid ASP (D)195.12%
Glycine GLY (G)267.01%
Phynylalanine PHE (F)71.89%
Isoleucine ILE (I)61.62%
Histidine HIS (H)61.62%
Lysine LYS (K)112.96%
Methionine MET (M)41.08%
Leucine LEU (L)349.16%
Asparagine ASN (N)102.7%
Glutamine GLN (Q)71.89%
Proline PRO (P)215.66%
Serine SER (S)318.36%
Arginine ARG (R)246.47%
Threonine THR (T)236.2%
Tryptophan TRP (W)133.5%
Valine VAL (V)277.28%
Tyrosine TYR (Y)82.16%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1740
HydrogenH2716
NitrogenN496
OxygenO535
SulphurS6

FormulaC1740H2716N496O535S6
Total Number of Atoms:5493


Total number of positively charged residues (ARG + LYS):35
Total number of negatively charged residues (ASP + GLU):42
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    83545
Absorption 0.1% (=1 g/l)    2.124,   assuming all pairs of CYS residues form cystines

Ext. coefficient    83420
Absorption 0.1% (=1 g/l)    2.121,   assuming all CYS residues are reduced
Aromaticity:0.075

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 34.73

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.61, 23.72, 35.04]

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:81.752
Grand average of hydropathicity (GRAVY):-0.15