Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1692
Number of amino acids:31
Molecular Weight:3209.66 Da
Theoretical pI:4.03


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)13.23%
Cysteine CYS (C)619.35%
Glutamic Acid GLU (E)13.23%
Aspartic Acid ASP (D)26.45%
Glycine GLY (G)516.13%
Phynylalanine PHE (F)13.23%
Isoleucine ILE (I)13.23%
Histidine HIS (H)00%
Lysine LYS (K)13.23%
Methionine MET (M)00%
Leucine LEU (L)13.23%
Asparagine ASN (N)13.23%
Glutamine GLN (Q)00%
Proline PRO (P)412.9%
Serine SER (S)00%
Arginine ARG (R)00%
Threonine THR (T)412.9%
Tryptophan TRP (W)13.23%
Valine VAL (V)13.23%
Tyrosine TYR (Y)13.23%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC136
HydrogenH202
NitrogenN34
OxygenO44
SulphurS6

FormulaC136H202N34O44S6
Total Number of Atoms:422


Total number of positively charged residues (ARG + LYS):1
Total number of negatively charged residues (ASP + GLU):3
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    7365
Absorption 0.1% (=1 g/l)    2.295,   assuming all pairs of CYS residues form cystines

Ext. coefficient    6990
Absorption 0.1% (=1 g/l)    2.178,   assuming all CYS residues are reduced
Aromaticity:0.097

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 33.29

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[19.35, 32.26, 9.68]

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:37.742
Grand average of hydropathicity (GRAVY):0.03