Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4686
Number of amino acids:119
Molecular Weight:12624.03 Da
Theoretical pI:4.71


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)2218.49%
Cysteine CYS (C)32.52%
Glutamic Acid GLU (E)119.24%
Aspartic Acid ASP (D)75.88%
Glycine GLY (G)86.72%
Phynylalanine PHE (F)54.2%
Isoleucine ILE (I)10.84%
Histidine HIS (H)43.36%
Lysine LYS (K)43.36%
Methionine MET (M)21.68%
Leucine LEU (L)1310.92%
Asparagine ASN (N)54.2%
Glutamine GLN (Q)54.2%
Proline PRO (P)21.68%
Serine SER (S)86.72%
Arginine ARG (R)54.2%
Threonine THR (T)43.36%
Tryptophan TRP (W)00%
Valine VAL (V)86.72%
Tyrosine TYR (Y)21.68%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC544
HydrogenH858
NitrogenN156
OxygenO180
SulphurS5

FormulaC544H858N156O180S5
Total Number of Atoms:1743


Total number of positively charged residues (ARG + LYS):9
Total number of negatively charged residues (ASP + GLU):18
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    3105
Absorption 0.1% (=1 g/l)    0.246,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.236,   assuming all CYS residues are reduced
Aromaticity:0.059

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 35.64

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.37, 19.33, 40.34]

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:83.8657
Grand average of hydropathicity (GRAVY):-0.12