Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4764
Number of amino acids:115
Molecular Weight:11463.41 Da
Theoretical pI:9.1


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1714.78%
Cysteine CYS (C)97.83%
Glutamic Acid GLU (E)10.87%
Aspartic Acid ASP (D)10.87%
Glycine GLY (G)97.83%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)65.22%
Histidine HIS (H)10.87%
Lysine LYS (K)76.09%
Methionine MET (M)21.74%
Leucine LEU (L)86.96%
Asparagine ASN (N)108.7%
Glutamine GLN (Q)21.74%
Proline PRO (P)76.09%
Serine SER (S)119.57%
Arginine ARG (R)21.74%
Threonine THR (T)76.09%
Tryptophan TRP (W)00%
Valine VAL (V)1311.3%
Tyrosine TYR (Y)21.74%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC488
HydrogenH822
NitrogenN142
OxygenO152
SulphurS11

FormulaC488H822N142O152S11
Total Number of Atoms:1615


Total number of positively charged residues (ARG + LYS):9
Total number of negatively charged residues (ASP + GLU):2
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    3480
Absorption 0.1% (=1 g/l)    0.304,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.260,   assuming all CYS residues are reduced
Aromaticity:0.017

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 27.10

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.22, 32.17, 24.35]

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:95.0433
Grand average of hydropathicity (GRAVY):0.43