Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5568
Number of amino acids:118
Molecular Weight:11911.01 Da
Theoretical pI:9.23


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1714.41%
Cysteine CYS (C)108.47%
Glutamic Acid GLU (E)10.85%
Aspartic Acid ASP (D)10.85%
Glycine GLY (G)1210.17%
Phynylalanine PHE (F)10.85%
Isoleucine ILE (I)65.08%
Histidine HIS (H)00%
Lysine LYS (K)43.39%
Methionine MET (M)43.39%
Leucine LEU (L)97.63%
Asparagine ASN (N)108.47%
Glutamine GLN (Q)32.54%
Proline PRO (P)86.78%
Serine SER (S)54.24%
Arginine ARG (R)65.08%
Threonine THR (T)119.32%
Tryptophan TRP (W)00%
Valine VAL (V)97.63%
Tyrosine TYR (Y)10.85%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC501
HydrogenH847
NitrogenN153
OxygenO153
SulphurS14

FormulaC501H847N153O153S14
Total Number of Atoms:1668


Total number of positively charged residues (ARG + LYS):10
Total number of negatively charged residues (ASP + GLU):2
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    2115
Absorption 0.1% (=1 g/l)    0.178,   assuming all pairs of CYS residues form cystines

Ext. coefficient    1490
Absorption 0.1% (=1 g/l)    0.125,   assuming all CYS residues are reduced
Aromaticity:0.017

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 41.62

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[22.03, 29.66, 26.27]

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:86.1017
Grand average of hydropathicity (GRAVY):0.33