Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2674
Number of amino acids:41
Molecular Weight:4455.11 Da
Theoretical pI:5.09


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)49.76%
Cysteine CYS (C)00%
Glutamic Acid GLU (E)614.63%
Aspartic Acid ASP (D)12.44%
Glycine GLY (G)37.32%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)49.76%
Histidine HIS (H)24.88%
Lysine LYS (K)49.76%
Methionine MET (M)12.44%
Leucine LEU (L)12.44%
Asparagine ASN (N)24.88%
Glutamine GLN (Q)12.44%
Proline PRO (P)37.32%
Serine SER (S)00%
Arginine ARG (R)00%
Threonine THR (T)24.88%
Tryptophan TRP (W)00%
Valine VAL (V)614.63%
Tyrosine TYR (Y)12.44%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC198
HydrogenH322
NitrogenN52
OxygenO62
SulphurS1

FormulaC198H322N52O62S1
Total Number of Atoms:635


Total number of positively charged residues (ARG + LYS):4
Total number of negatively charged residues (ASP + GLU):7
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    1490
Absorption 0.1% (=1 g/l)    0.334
Aromaticity:0.024

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 26.43

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.27, 19.51, 29.27]

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:99.756
Grand average of hydropathicity (GRAVY):-0.23