Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3883
Number of amino acids:92
Molecular Weight:9495.09 Da
Theoretical pI:9.01


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1213.04%
Cysteine CYS (C)88.7%
Glutamic Acid GLU (E)11.09%
Aspartic Acid ASP (D)55.43%
Glycine GLY (G)55.43%
Phynylalanine PHE (F)33.26%
Isoleucine ILE (I)55.43%
Histidine HIS (H)11.09%
Lysine LYS (K)1111.96%
Methionine MET (M)11.09%
Leucine LEU (L)55.43%
Asparagine ASN (N)22.17%
Glutamine GLN (Q)44.35%
Proline PRO (P)44.35%
Serine SER (S)1010.87%
Arginine ARG (R)11.09%
Threonine THR (T)77.61%
Tryptophan TRP (W)00%
Valine VAL (V)77.61%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC406
HydrogenH680
NitrogenN114
OxygenO128
SulphurS9

FormulaC406H680N114O128S9
Total Number of Atoms:1337


Total number of positively charged residues (ARG + LYS):12
Total number of negatively charged residues (ASP + GLU):6
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)    0.053,   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:0.033

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 38.17

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[21.74, 22.83, 20.65]

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:77.5
Grand average of hydropathicity (GRAVY):0.10