Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6087
Number of amino acids:123
Molecular Weight:12751.1 Da
Theoretical pI:8.85


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1512.2%
Cysteine CYS (C)86.5%
Glutamic Acid GLU (E)21.63%
Aspartic Acid ASP (D)43.25%
Glycine GLY (G)86.5%
Phynylalanine PHE (F)10.81%
Isoleucine ILE (I)43.25%
Histidine HIS (H)10.81%
Lysine LYS (K)97.32%
Methionine MET (M)54.07%
Leucine LEU (L)86.5%
Asparagine ASN (N)75.69%
Glutamine GLN (Q)43.25%
Proline PRO (P)86.5%
Serine SER (S)75.69%
Arginine ARG (R)21.63%
Threonine THR (T)86.5%
Tryptophan TRP (W)10.81%
Valine VAL (V)1915.45%
Tyrosine TYR (Y)21.63%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC554
HydrogenH920
NitrogenN152
OxygenO164
SulphurS13

FormulaC554H920N152O164S13
Total Number of Atoms:1803


Total number of positively charged residues (ARG + LYS):11
Total number of negatively charged residues (ASP + GLU):6
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    8980
Absorption 0.1% (=1 g/l)    0.704,   assuming all pairs of CYS residues form cystines

Ext. coefficient    8480
Absorption 0.1% (=1 g/l)    0.665,   assuming all CYS residues are reduced
Aromaticity:0.033

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 20.29

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.46, 24.39, 24.39]

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:95.0408
Grand average of hydropathicity (GRAVY):0.41