Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4520
Number of amino acids:627
Molecular Weight:69704.65 Da
Theoretical pI:8.49


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)426.7%
Cysteine CYS (C)152.39%
Glutamic Acid GLU (E)213.35%
Aspartic Acid ASP (D)325.1%
Glycine GLY (G)386.06%
Phynylalanine PHE (F)345.42%
Isoleucine ILE (I)355.58%
Histidine HIS (H)81.28%
Lysine LYS (K)274.31%
Methionine MET (M)132.07%
Leucine LEU (L)629.89%
Asparagine ASN (N)355.58%
Glutamine GLN (Q)264.15%
Proline PRO (P)294.63%
Serine SER (S)599.41%
Arginine ARG (R)325.1%
Threonine THR (T)447.02%
Tryptophan TRP (W)60.96%
Valine VAL (V)436.86%
Tyrosine TYR (Y)264.15%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3118
HydrogenH4867
NitrogenN833
OxygenO924
SulphurS28

FormulaC3118H4867N833O924S28
Total Number of Atoms:9770


Total number of positively charged residues (ARG + LYS):59
Total number of negatively charged residues (ASP + GLU):53
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    72615
Absorption 0.1% (=1 g/l)    1.042,   assuming all pairs of CYS residues form cystines

Ext. coefficient    71740
Absorption 0.1% (=1 g/l)    1.029,   assuming all CYS residues are reduced
Aromaticity:0.105

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 44.44

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.85, 25.68, 22.01]

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:86.9219
Grand average of hydropathicity (GRAVY):-0.07