Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6097
Number of amino acids:96
Molecular Weight:10276.16 Da
Theoretical pI:4.86


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1111.46%
Cysteine CYS (C)88.33%
Glutamic Acid GLU (E)22.08%
Aspartic Acid ASP (D)33.13%
Glycine GLY (G)22.08%
Phynylalanine PHE (F)55.21%
Isoleucine ILE (I)55.21%
Histidine HIS (H)00%
Lysine LYS (K)22.08%
Methionine MET (M)55.21%
Leucine LEU (L)1212.5%
Asparagine ASN (N)88.33%
Glutamine GLN (Q)44.17%
Proline PRO (P)66.25%
Serine SER (S)55.21%
Arginine ARG (R)22.08%
Threonine THR (T)1010.42%
Tryptophan TRP (W)00%
Valine VAL (V)66.25%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC446
HydrogenH728
NitrogenN116
OxygenO134
SulphurS13

FormulaC446H728N116O134S13
Total Number of Atoms:1437


Total number of positively charged residues (ARG + LYS):4
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    500
Absorption 0.1% (=1 g/l)    0.049,   assuming all pairs of CYS residues form cystines

Ext. coefficient    0
Absorption 0.1% (=1 g/l)    0.000,   assuming all CYS residues are reduced
Aromaticity:0.052

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 35.73

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.17, 21.88, 31.25]

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:98.6458
Grand average of hydropathicity (GRAVY):0.61