Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1337
Number of amino acids:245
Molecular Weight:26408.81 Da
Theoretical pI:8.75


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)156.12%
Cysteine CYS (C)197.76%
Glutamic Acid GLU (E)52.04%
Aspartic Acid ASP (D)124.9%
Glycine GLY (G)2510.2%
Phynylalanine PHE (F)114.49%
Isoleucine ILE (I)135.31%
Histidine HIS (H)52.04%
Lysine LYS (K)166.53%
Methionine MET (M)62.45%
Leucine LEU (L)197.76%
Asparagine ASN (N)104.08%
Glutamine GLN (Q)62.45%
Proline PRO (P)145.71%
Serine SER (S)176.94%
Arginine ARG (R)104.08%
Threonine THR (T)145.71%
Tryptophan TRP (W)31.22%
Valine VAL (V)197.76%
Tyrosine TYR (Y)62.45%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1161
HydrogenH1838
NitrogenN320
OxygenO333
SulphurS25

FormulaC1161H1838N320O333S25
Total Number of Atoms:3677


Total number of positively charged residues (ARG + LYS):26
Total number of negatively charged residues (ASP + GLU):17
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    26565
Absorption 0.1% (=1 g/l)    1.006,   assuming all pairs of CYS residues form cystines

Ext. coefficient    25440
Absorption 0.1% (=1 g/l)    0.963,   assuming all CYS residues are reduced
Aromaticity:0.082

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 39.60

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.98, 26.94, 18.37]

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:79.551
Grand average of hydropathicity (GRAVY):0.09