Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3928
Number of amino acids:91
Molecular Weight:9694.96 Da
Theoretical pI:8.19


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)44.4%
Cysteine CYS (C)88.79%
Glutamic Acid GLU (E)11.1%
Aspartic Acid ASP (D)55.49%
Glycine GLY (G)99.89%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)66.59%
Histidine HIS (H)22.2%
Lysine LYS (K)44.4%
Methionine MET (M)11.1%
Leucine LEU (L)66.59%
Asparagine ASN (N)1010.99%
Glutamine GLN (Q)55.49%
Proline PRO (P)66.59%
Serine SER (S)88.79%
Arginine ARG (R)44.4%
Threonine THR (T)33.3%
Tryptophan TRP (W)00%
Valine VAL (V)66.59%
Tyrosine TYR (Y)33.3%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC404
HydrogenH656
NitrogenN126
OxygenO133
SulphurS9

FormulaC404H656N126O133S9
Total Number of Atoms:1328


Total number of positively charged residues (ARG + LYS):8
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    4970
Absorption 0.1% (=1 g/l)    0.513,   assuming all pairs of CYS residues form cystines

Ext. coefficient    4470
Absorption 0.1% (=1 g/l)    0.461,   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 : 39.27

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[23.08, 36.26, 13.19]

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:74.9451
Grand average of hydropathicity (GRAVY):-0.39