Physicochemical Properties of Peptide



PPepDB ID:PPepDB_579
Number of amino acids:102
Molecular Weight:10735.7 Da
Theoretical pI:6.78


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)87.84%
Cysteine CYS (C)65.88%
Glutamic Acid GLU (E)65.88%
Aspartic Acid ASP (D)43.92%
Glycine GLY (G)76.86%
Phynylalanine PHE (F)21.96%
Isoleucine ILE (I)1110.78%
Histidine HIS (H)10.98%
Lysine LYS (K)98.82%
Methionine MET (M)21.96%
Leucine LEU (L)109.8%
Asparagine ASN (N)43.92%
Glutamine GLN (Q)10.98%
Proline PRO (P)54.9%
Serine SER (S)98.82%
Arginine ARG (R)10.98%
Threonine THR (T)65.88%
Tryptophan TRP (W)00%
Valine VAL (V)98.82%
Tyrosine TYR (Y)10.98%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC473
HydrogenH793
NitrogenN121
OxygenO144
SulphurS8

FormulaC473H793N121O144S8
Total Number of Atoms:1539


Total number of positively charged residues (ARG + LYS):10
Total number of negatively charged residues (ASP + GLU):10
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    1865
Absorption 0.1% (=1 g/l)    0.174,   assuming all pairs of CYS residues form cystines

Ext. coefficient    1490
Absorption 0.1% (=1 g/l)    0.139,   assuming all CYS residues are reduced
Aromaticity:0.029

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 30.16

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.35, 24.51, 25.49]

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:113.725
Grand average of hydropathicity (GRAVY):0.44