Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1288
Number of amino acids:100
Molecular Weight:10447.28 Da
Theoretical pI:6.68


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1212%
Cysteine CYS (C)66%
Glutamic Acid GLU (E)33%
Aspartic Acid ASP (D)55%
Glycine GLY (G)77%
Phynylalanine PHE (F)44%
Isoleucine ILE (I)66%
Histidine HIS (H)22%
Lysine LYS (K)88%
Methionine MET (M)22%
Leucine LEU (L)1010%
Asparagine ASN (N)44%
Glutamine GLN (Q)11%
Proline PRO (P)55%
Serine SER (S)55%
Arginine ARG (R)00%
Threonine THR (T)99%
Tryptophan TRP (W)00%
Valine VAL (V)99%
Tyrosine TYR (Y)22%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC465
HydrogenH753
NitrogenN117
OxygenO138
SulphurS8

FormulaC465H753N117O138S8
Total Number of Atoms:1481


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    3355
Absorption 0.1% (=1 g/l)    0.321,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.285,   assuming all CYS residues are reduced
Aromaticity:0.060

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 17.19

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.00, 21.00, 27.00]

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:100.5
Grand average of hydropathicity (GRAVY):0.48