Physicochemical Properties of Peptide



PPepDB ID:PPepDB_590
Number of amino acids:104
Molecular Weight:10809.69 Da
Theoretical pI:6.77


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1312.5%
Cysteine CYS (C)65.77%
Glutamic Acid GLU (E)65.77%
Aspartic Acid ASP (D)21.92%
Glycine GLY (G)87.69%
Phynylalanine PHE (F)43.85%
Isoleucine ILE (I)1211.54%
Histidine HIS (H)10.96%
Lysine LYS (K)65.77%
Methionine MET (M)10.96%
Leucine LEU (L)98.65%
Asparagine ASN (N)76.73%
Glutamine GLN (Q)00%
Proline PRO (P)54.81%
Serine SER (S)65.77%
Arginine ARG (R)21.92%
Threonine THR (T)87.69%
Tryptophan TRP (W)00%
Valine VAL (V)76.73%
Tyrosine TYR (Y)10.96%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC479
HydrogenH787
NitrogenN125
OxygenO143
SulphurS7

FormulaC479H787N125O143S7
Total Number of Atoms:1541


Total number of positively charged residues (ARG + LYS):8
Total number of negatively charged residues (ASP + GLU):8
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)    0.173,   assuming all pairs of CYS residues form cystines

Ext. coefficient    1490
Absorption 0.1% (=1 g/l)    0.138,   assuming all CYS residues are reduced
Aromaticity:0.048

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 27.62

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.73, 25.00, 27.88]

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:110.769
Grand average of hydropathicity (GRAVY):0.56