Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1983
Number of amino acids:31
Molecular Weight:3473.95 Da
Theoretical pI:6.08


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)00%
Cysteine CYS (C)619.35%
Glutamic Acid GLU (E)13.23%
Aspartic Acid ASP (D)26.45%
Glycine GLY (G)39.68%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)13.23%
Histidine HIS (H)00%
Lysine LYS (K)26.45%
Methionine MET (M)00%
Leucine LEU (L)26.45%
Asparagine ASN (N)26.45%
Glutamine GLN (Q)13.23%
Proline PRO (P)26.45%
Serine SER (S)13.23%
Arginine ARG (R)13.23%
Threonine THR (T)412.9%
Tryptophan TRP (W)13.23%
Valine VAL (V)00%
Tyrosine TYR (Y)26.45%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC144
HydrogenH222
NitrogenN40
OxygenO48
SulphurS6

FormulaC144H222N40O48S6
Total Number of Atoms:460


Total number of positively charged residues (ARG + LYS):3
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    8855
Absorption 0.1% (=1 g/l)    2.549,   assuming all pairs of CYS residues form cystines

Ext. coefficient    8480
Absorption 0.1% (=1 g/l)    2.441,   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 : 27.22

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[19.35, 25.81, 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:37.7419
Grand average of hydropathicity (GRAVY):-0.57