Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4423
Number of amino acids:622
Molecular Weight:69209.68 Da
Theoretical pI:5.56


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)396.27%
Cysteine CYS (C)345.47%
Glutamic Acid GLU (E)447.07%
Aspartic Acid ASP (D)365.79%
Glycine GLY (G)548.68%
Phynylalanine PHE (F)264.18%
Isoleucine ILE (I)325.14%
Histidine HIS (H)81.29%
Lysine LYS (K)457.23%
Methionine MET (M)132.09%
Leucine LEU (L)426.75%
Asparagine ASN (N)325.14%
Glutamine GLN (Q)243.86%
Proline PRO (P)264.18%
Serine SER (S)406.43%
Arginine ARG (R)254.02%
Threonine THR (T)284.5%
Tryptophan TRP (W)111.77%
Valine VAL (V)406.43%
Tyrosine TYR (Y)233.7%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3040
HydrogenH4717
NitrogenN825
OxygenO930
SulphurS47

FormulaC3040H4717N825O930S47
Total Number of Atoms:9559


Total number of positively charged residues (ARG + LYS):70
Total number of negatively charged residues (ASP + GLU):80
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    96895
Absorption 0.1% (=1 g/l)    1.400,   assuming all pairs of CYS residues form cystines

Ext. coefficient    94770
Absorption 0.1% (=1 g/l)    1.369,   assuming all CYS residues are reduced
Aromaticity:0.096

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 40.88

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.97, 24.44, 22.19]

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:71.3183
Grand average of hydropathicity (GRAVY):-0.35