Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4785
Number of amino acids:324
Molecular Weight:34677.94 Da
Theoretical pI:7.47


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)257.72%
Cysteine CYS (C)195.86%
Glutamic Acid GLU (E)72.16%
Aspartic Acid ASP (D)175.25%
Glycine GLY (G)4112.65%
Phynylalanine PHE (F)154.63%
Isoleucine ILE (I)164.94%
Histidine HIS (H)30.93%
Lysine LYS (K)123.7%
Methionine MET (M)30.93%
Leucine LEU (L)237.1%
Asparagine ASN (N)144.32%
Glutamine GLN (Q)154.63%
Proline PRO (P)195.86%
Serine SER (S)319.57%
Arginine ARG (R)134.01%
Threonine THR (T)206.17%
Tryptophan TRP (W)72.16%
Valine VAL (V)92.78%
Tyrosine TYR (Y)154.63%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1525
HydrogenH2309
NitrogenN417
OxygenO468
SulphurS22

FormulaC1525H2309N417O468S22
Total Number of Atoms:4741


Total number of positively charged residues (ARG + LYS):25
Total number of negatively charged residues (ASP + GLU):24
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    61975
Absorption 0.1% (=1 g/l)    1.787,   assuming all pairs of CYS residues form cystines

Ext. coefficient    60850
Absorption 0.1% (=1 g/l)    1.755,   assuming all CYS residues are reduced
Aromaticity:0.114

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 43.85

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.23, 32.41, 17.90]

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:62.7161
Grand average of hydropathicity (GRAVY):-0.23