Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6082
Number of amino acids:220
Molecular Weight:23213.72 Da
Theoretical pI:6.81


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)188.18%
Cysteine CYS (C)31.36%
Glutamic Acid GLU (E)52.27%
Aspartic Acid ASP (D)83.64%
Glycine GLY (G)188.18%
Phynylalanine PHE (F)177.73%
Isoleucine ILE (I)83.64%
Histidine HIS (H)31.36%
Lysine LYS (K)73.18%
Methionine MET (M)41.82%
Leucine LEU (L)2511.36%
Asparagine ASN (N)156.82%
Glutamine GLN (Q)62.73%
Proline PRO (P)177.73%
Serine SER (S)219.55%
Arginine ARG (R)62.73%
Threonine THR (T)156.82%
Tryptophan TRP (W)10.45%
Valine VAL (V)2210%
Tyrosine TYR (Y)10.45%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1051
HydrogenH1649
NitrogenN273
OxygenO305
SulphurS7

FormulaC1051H1649N273O305S7
Total Number of Atoms:3285


Total number of positively charged residues (ARG + LYS):13
Total number of negatively charged residues (ASP + GLU):13
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    7115
Absorption 0.1% (=1 g/l)    0.306,   assuming all pairs of CYS residues form cystines

Ext. coefficient    6990
Absorption 0.1% (=1 g/l)    0.301,   assuming all CYS residues are reduced
Aromaticity:0.086

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 24.82

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.64, 32.27, 23.64]

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:95.6817
Grand average of hydropathicity (GRAVY):0.33