Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5042
Number of amino acids:233
Molecular Weight:25111.93 Da
Theoretical pI:5.9


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)208.58%
Cysteine CYS (C)31.29%
Glutamic Acid GLU (E)52.15%
Aspartic Acid ASP (D)104.29%
Glycine GLY (G)219.01%
Phynylalanine PHE (F)208.58%
Isoleucine ILE (I)93.86%
Histidine HIS (H)52.15%
Lysine LYS (K)62.58%
Methionine MET (M)73%
Leucine LEU (L)2611.16%
Asparagine ASN (N)177.3%
Glutamine GLN (Q)83.43%
Proline PRO (P)156.44%
Serine SER (S)135.58%
Arginine ARG (R)62.58%
Threonine THR (T)156.44%
Tryptophan TRP (W)10.43%
Valine VAL (V)219.01%
Tyrosine TYR (Y)52.15%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1146
HydrogenH1757
NitrogenN293
OxygenO322
SulphurS10

FormulaC1146H1757N293O322S10
Total Number of Atoms:3528


Total number of positively charged residues (ARG + LYS):12
Total number of negatively charged residues (ASP + GLU):15
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    13075
Absorption 0.1% (=1 g/l)    0.521,   assuming all pairs of CYS residues form cystines

Ext. coefficient    12950
Absorption 0.1% (=1 g/l)    0.516,   assuming all CYS residues are reduced
Aromaticity:0.112

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 26.02

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[35.19, 28.33, 24.89]

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:93.3047
Grand average of hydropathicity (GRAVY):0.31