Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5421
Number of amino acids:342
Molecular Weight:37676.49 Da
Theoretical pI:6.08


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)257.31%
Cysteine CYS (C)30.88%
Glutamic Acid GLU (E)133.8%
Aspartic Acid ASP (D)226.43%
Glycine GLY (G)236.73%
Phynylalanine PHE (F)216.14%
Isoleucine ILE (I)164.68%
Histidine HIS (H)82.34%
Lysine LYS (K)185.26%
Methionine MET (M)10.29%
Leucine LEU (L)3710.82%
Asparagine ASN (N)205.85%
Glutamine GLN (Q)92.63%
Proline PRO (P)185.26%
Serine SER (S)319.06%
Arginine ARG (R)133.8%
Threonine THR (T)267.6%
Tryptophan TRP (W)41.17%
Valine VAL (V)226.43%
Tyrosine TYR (Y)123.51%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1703
HydrogenH2622
NitrogenN448
OxygenO511
SulphurS4

FormulaC1703H2622N448O511S4
Total Number of Atoms:5288


Total number of positively charged residues (ARG + LYS):31
Total number of negatively charged residues (ASP + GLU):35
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    40005
Absorption 0.1% (=1 g/l)    1.062,   assuming all pairs of CYS residues form cystines

Ext. coefficient    39880
Absorption 0.1% (=1 g/l)    1.058,   assuming all CYS residues are reduced
Aromaticity:0.108

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 34.06

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.75, 26.90, 22.22]

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:86.4034
Grand average of hydropathicity (GRAVY):-0.18