Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5948
Number of amino acids:76
Molecular Weight:8465.09 Da
Theoretical pI:8.47


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)56.58%
Cysteine CYS (C)810.53%
Glutamic Acid GLU (E)33.95%
Aspartic Acid ASP (D)22.63%
Glycine GLY (G)45.26%
Phynylalanine PHE (F)45.26%
Isoleucine ILE (I)56.58%
Histidine HIS (H)00%
Lysine LYS (K)67.89%
Methionine MET (M)22.63%
Leucine LEU (L)810.53%
Asparagine ASN (N)56.58%
Glutamine GLN (Q)22.63%
Proline PRO (P)33.95%
Serine SER (S)45.26%
Arginine ARG (R)22.63%
Threonine THR (T)33.95%
Tryptophan TRP (W)00%
Valine VAL (V)67.89%
Tyrosine TYR (Y)45.26%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC377
HydrogenH601
NitrogenN95
OxygenO105
SulphurS10

FormulaC377H601N95O105S10
Total Number of Atoms:1188


Total number of positively charged residues (ARG + LYS):8
Total number of negatively charged residues (ASP + GLU):5
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    6460
Absorption 0.1% (=1 g/l)    0.763,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5960
Absorption 0.1% (=1 g/l)    0.704,   assuming all CYS residues are reduced
Aromaticity:0.105

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 27.97

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[35.53, 21.05, 23.68]

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:96.1842
Grand average of hydropathicity (GRAVY):0.41